Author: Admin Cyber

Val-d’Or, QC – June 4^th, 2026 – Bonterra Resources Inc. (TSX-V: BTR, OTCQX: BONXF, FSE: 9BR2) (“Bonterra” or the “Company”) is pleased to announce the expansion of the Barry deposit at depth, as a result of deep drilling conducted at the Barry property (the “Project”). The Project is under a definitive earn-in and joint venture agreement (the “JV Agreement”) with Gold Fields Limited (“Gold Fields”). Under the JV Agreement, Gold Fields has the right to acquire a 70% interest in the Project by spending C$30 million in work expenditures, with a minimum spending commitment of C$10 million per year over a three-year period (see press release dated November 28, 2023, for more details). 

Cesar Gonzalez, Executive Chairman and Interim CEO commented: “The discovery of mineralization extending at depth at the Barry deposit is a significant development, underscoring the potential to substantially increase gold ounces beyond the current mineral resources. The results released today were drilled approximately 100 meters from the boundary of the mineral resource estimate published last February. Notably, all five drill holes intersected potential mineralization consistent with Zone H at the Barry deposit. We congratulate our partner, Gold Fields, on this discovery and look forward to the continued advancement of exploration work on the Barry property.”

Highlights Barry Deep Drill Results

• 7.59 g/t Au over 1.9 m, including 17.75 g/t Au over 0.6 m, in hole BAR-26-0617
• 4.60 g/t Au over 2.5 m, including 11.1 g/t Au over 0.5 m, in hole BAR-26-0617
• 4.15 g/t Au over 0.4 m in hole BAR-26-0615
• 2.63 g/t Au over 1.6 m, including 7.52 g/t over 0.4 m, in hole BAR-26-0615
• 3.42 g/t Au over 2.1 m, including 5.77 g/t Au over 0.8 m, in hole BAR-26-0616
• 5.75 g/t Au over 1.2 m, including 13.4 g/t Au over 0.4 m, in hole BAR-26-0616
• 4.68 g/t Au over 0.4 m in hole BAR-26-0619
• 6.48 g/t Au over 2.2 m including 17.15 g/t Au over 0.5 m in hole BAR-26-0619

2026 Exploration Program Updates

The 2026 exploration program was designed to test targets located south-west and east of the Barry deposit and included deep drilling to evaluate the down-plunge extension of mineralization at depths of approximately 750 to 850 meters, as well as the eastern down-plunge extension of the deposit. Diamond drilling at Barry began in January with two drill rigs and was completed in April. A total of 14 diamond drill holes totaling 8,346 m has been completed. A total of 9,465 NQ core samples has been submitted to accredited laboratories, with about 30% of assay results pending. 

The ground gravimetry survey that started last year is now complete. The survey was focused on improving a 200X200 m grid south of the Windfall Project and completing a 100X100 m survey around the Gladiator deposit. 

Figure 1: Surface Plan View with 2026 Completed Drill Holes at Barry

Figure 2: Long Section View with Barry Deep Holes Drill Results

Barry Project Highlights

The Barry deposit is characterized by three dominant sets of structures, all dipping to the southeast.  The sub-vertical shear zones and the H-Series shear zones dipping 25 to 40 degrees are hosted within intermediate to mafic volcanics and tuffs with local felsic intrusions. Contact zones dip at 50 to 65 degrees along the lower and upper contacts of the D1, D2 and D3 felsic intrusions with mafic volcanics. Gold mineralization is associated with disseminated sulfides within shear zones and veins with local visible gold. The Barry deposit has been delineated over 1.4 kilometers along strike and 700 m vertically and remains open for further expansion.

The latest Mineral Resource Estimate (the “2026 MRE”, press release dated February 23, 2026) contains an Open pit mineral resources 7.8 million tonnes (“Mt”) at an average grade of 1.67 g/t Au for 417 thousand ounces (“Koz”) of Measured & Indicated Mineral Resources, plus 125 thousand tonnes (“Kt”) at 2.32 g/t Au for 9 Koz of Inferred Mineral Resources. Underground Mineral Resources contains 4.1 Mt at an average grade of 3.47 g/t Au for 457 Koz of Measured & Indicated Mineral Resources, plus 8.8 Mt at 3.41 g/t Au for 972 Koz of Inferred Mineral Resources (see press release dated February 23, 2026). 

The Barry Mine was in production between 2008 and 2010, during which time it produced approximately 44,000 ounces of gold. In 2018, Bonterra constructed an underground exploration ramp extending to 100 m below surface. The Company currently maintains a mining lease for 1.2 million tonnes, permitting extraction by both open pit and underground methods. The project is supported by established infrastructure and essential permits required to facilitate a restart of operations.

Table 1: Drill Hole Locations –Barry Deep Target

Hole ID	Easting	Northing	Elevation (m)	Azimuth (°)	Dip (°)	Length (m)
BAR-26-0615	444424	5425623	394	329	-60	1,002
BAR-26-0616	444417	5425373	392	330	-60	1,179
BAR-26-0617	444640	5425661	393	329	-59	1,143
BAR-26-0618	444186	5425344	393	331	-58	1,050
BAR-26-0619	444650	5425896	392	332	-60	999

UTM Coordinates, System: NAD83 Zone 18N

Table 2: Significant Mineralized Intersections from Drilling on the Barry Deep Target 

Hole ID	Including	From (m)	To (m)	Length (m)	Grade (Au g/t)	Metal Factor (length x grade)
BAR-26-0615		771.1	771.5	0.40	4.15	1.66
		779.4	781	1.60	2.63	4.21
	Including	779.4	779.8	0.40	7.52	3.00
	Including	780.5	781	0.50	1.73	0.86
BAR-26-0616		937.8	939.0	1.20	5.75	6.90
	Including	937.8	938.6	0.80	1.93	1.04
	Including	938.6	939.0	0.40	13.40	5.36
		1,035.8	1,037.9	2.10	3.42	7.18
	Including	1,035.8	1,036.2	0.40	0.85	0.34
	Including	1,036.2	1,037.0	0.80	5.77	4.62
	Including	1,037.0	1,037.4	0.40	2.66	1.06
BAR-26-0617		796.6	798.5	1.90	7.59	14.42
	Including	796.6	797.2	0.60	4.46	2.68
		797.2	797.8	0.60	17.75	10.65
		797.8	798.5	0.70	1.10	0.77
		879.0	881.5	2.50	4.60	11.50
	Including	879.0	879.4	0.40	1.37	0.55
	Including	879.4	879.7	0.30	8.97	2.69
	Including	879.7	881.0	1.30	1.46	1.90
	Including	881.0	881.5	0.50	11.10	5.55
BAR-26-0618		878.3	879.0	0.70	0.97	0.68
BAR-26-0619		581.6	582.0	0.40	4.68	1.87
		888.0	890.2	2.20	6.48	14.26
	Including	888.0	888.4	0.40	3.29	1.32
	Including	888.4	888.8	0.40	5.29	2.12
	Including	888.8	889.1	0.30	3.86	1.16
	Including	889.1	889.4	0.30	3.49	1.05
	Including	889.4	889.7	0.30	0.14	0.04
	Including	889.7	890.2	0.50	17.15	8.58

1. True width determination is currently unknown but is estimated from 55 to 80% of the reported core length interval for the zone. 
2. Assays are uncut except where indicated.
3. Intercepts have not been correlated to individual zones or vein domains at this time.

Quality Control and Reporting Protocols

NQ core assays were obtained by either 1-kilogram screen fire assay or standard 50-gram fire-assaying-AA finish or gravimetric finish at ALS Laboratories in Val-d’Or, Québec, or Vancouver, British Colombia. The 1-kilogram screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. All samples are also analyzed for multi-elements, including silver, using Four Acid Digestion-ICP-MS method at ALS Laboratories. Drill program design, Quality Assurance/Quality Control (“QA/QC”) and interpretation of results is performed by qualified persons employing a QA/QC program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for QA/QC purposes.

Qualified Person

M. Donald Trudel, P.Geo. (OGQ # 813), Director Geology for the Company, has reviewed and approved the technical information contained in this press release. Mr. Trudel is a qualified person as defined by National Instrument 43-101 on standards of disclosure for mineral projects.

About Bonterra Resources

Bonterra is a Canadian gold exploration company with a portfolio of advanced exploration assets anchored by a central milling facility in Québec, Canada. The Company’s assets include the Gladiator, Barry⁽¹⁾, Moroy, and Bachelor⁽²⁾ gold deposits, which collectively hold 16.8 million tonnes (“Mt”) at an average grade of 3.02 g/t Au for 1.63 million ounces (“Moz”) of Measured & Indicated Mineral Resources, plus 15.6 Mt at 4.32 g/t Au for 2.17 Moz at an average grade of 4.32 g/t Au of Inferred Mineral Resources.

In November 2023, the Company entered into an earn-in and joint venture agreement with Osisko Mining Inc. (“Osisko Mining”) for the Urban-Barry properties (the “JV Agreement”), which include the Gladiator and Barry deposits. In October 2024, Gold Fields Ltd, through a wholly owned Canadian subsidiary, completed the acquisition of Osisko Mining for C$2.16 billion. Gold Fields is now the counterparty to the JV Agreement and can continue to earn a 70% interest in the joint venture by incurring C$30 million in work expenditures on or before November 2026 (including expenditures incurred by Osisko Mining prior to October 2024). This strategic transaction highlights Bonterra’s dedication to advancing its exploration assets, marking a significant step towards development.

1. See news release of the Company dated February 23, 2026, and titled “Bonterra Reports Significant Mineral Resources Growth at Barry and Gladiator Deposits” for further details. 
2. See news release of the Company dated April 1st, 2026, and titled “Bonterra Reports Significant Mineral Resource Growth at Bachelor and Moroy, 100% owned Deposits and Provides Corporate Updates” for further details. 

This news release, including the drill results and the Mineral Resource Estimates referenced herein, has been prepared solely by the Company and is based on information available to the Company as of the date hereof. Neither Gold Fields Limited nor its affiliate Windfall Mining Group Inc. has verified, approved or endorsed the Mineral Resource Estimates or the content of this news release, and no representation or warranty is made by Gold Fields Limited or Windfall Mining Group Inc. with respect thereto. References to the Phoenix Joint Venture are provided for contextual purposes only and should not be construed as statements made by, or on behalf of, Gold Fields Limited or Windfall Mining Group Inc.

FOR ADDITIONAL INFORMATION

Cesar Gonzalez, Executive Chairman & Interim CEO
ir@btrgold.com

2872 Sullivan Road, Suite 2, Val d’Or, Québec J9P 0B9

819-825-8678 | Website: www.btrgold.com

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Caution regarding forward-looking statements

This news release contains forward-looking statements within the meaning of applicable securities laws. All statements other than statements of historical fact may be forward-looking and are often identified by words such as “may”, “will”, “plan”, “expect”, “anticipate”, “estimate”, and “intend”. Forward-looking statements in this release include, without limitation, statements regarding the 2026 exploration program and Gold Fields’ ability to complete the remaining earn-in expenditures under the JV Agreement.

These statements are based on assumptions considered reasonable by management, including assumptions regarding exploration plans, budgets, schedules, regulatory approvals, and the continued advancement of work by Gold Fields. However, forward-looking statements involve known and unknown risks, uncertainties, and other factors that may cause actual results to differ materially. Such risks include, but are not limited to, changes to exploration plans, results that differ from expectations, operational or permitting challenges, the ability of the parties to complete the Joint Venture, the timing and completion of earn-in expenditures, the speculative nature of mineral exploration, commodity price fluctuations, and the availability of financing. Additional information regarding risks can be found in the Company’s filings at www.sedarplus.ca. 

Readers are cautioned not to place undue reliance on forward-looking statements. The Company does not undertake to update any forward-looking statement except as required by applicable securities laws. All forward-looking statements in this release are expressly qualified by this cautionary statement.

Val-d’Or, QC – June 3^rd, 2026 – Bonterra Resources Inc. (TSX-V: BTR, OTCQX: BONXF, FSE: 9BR2) (“Bonterra” or the “Company”) congratulates Windfall Mining Group Inc. (“Windfall Mining”), a wholly owned subsidiary of Gold Fields Limited (“Gold Fields”), together with the Cree First Nation of Waswanipi, the Cree Nation Government and the Grand Council of the Crees (Eeyou Istchee), on the signing of a landmark Impact Benefit Agreement for the Windfall Project, known as the Uukiimau Agreement.

Bonterra is partnered with Gold Fields on the Phoenix JV, which is adjacent to the Windfall Project, under a definitive earn-in and joint venture agreement (the “JV Agreement”) with Windfall Mining (see press release dated November 28, 2023). The signing of the Uukiimau Agreement represents an important milestone for the broader Urban-Barry camp and reflects the continued advancement of responsible resource development in partnership with Indigenous communities.

Cesar Gonzalez, Executive Chairman & Interim CEO of Bonterra, commented: “On behalf of Bonterra, I would like to congratulate Gold Fields, Windfall Mining, the Cree First Nation of Waswanipi, the Cree Nation Government and the Grand Council of the Crees on this important achievement. The Uukiimau Agreement is a meaningful milestone for the Windfall Project and the region, and reflects the importance of building long-term partnerships based on respect, dialogue and shared benefits. As partners with Gold Fields on the Phoenix JV, we are encouraged by this important progress in the Urban-Barry camp.”

Bonterra looks forward to the continued advancement of the Phoenix JV under the leadership of Gold Fields and in alignment with the highest standards of environmental stewardship, community engagement and responsible mineral development.

ABOUT BONTERRA

Bonterra is a Canadian gold exploration company with a portfolio of advanced exploration assets anchored by a central milling facility in Québec, Canada. The Company’s assets include the Gladiator, Barry⁽¹⁾, Moroy, and Bachelor⁽²⁾

gold deposits, which collectively hold 16.8 million tonnes (“Mt”) at an average grade of 3.02 g/t Au for 1.63 million ounces (“Moz”) of Measured & Indicated Mineral Resources, plus 15.6 Mt at an average grade of 4.32 g/t Au for 2.17 Moz Au of Inferred Mineral Resources.

In November 2023, the Company entered into an earn-in and joint venture agreement with Osisko Mining Inc. (“Osisko Mining”) for the Urban-Barry properties (the “JV Agreement”), which include the Gladiator and Barry deposits. In October 2024, Gold Fields, through a wholly owned Canadian subsidiary, completed the acquisition of Osisko Mining for C$2.16 billion. Gold Fields is now the counterparty to the JV Agreement and can continue to earn a 70% interest in the joint venture by incurring C$30 million in work expenditures on or before November 2026 (including expenditures incurred by Osisko Mining prior to October 2024). This strategic transaction highlights Bonterra’s dedication to advancing its exploration assets, marking a significant step towards development.

1. See news release of the Company dated February 23, 2026 and titled “Bonterra Reports Significant Mineral Resources Growth at Barry and Gladiator Deposits” for further details.
2. See news release of the Company dated April 1, 2026 and titled “Bonterra Reports Significant Mineral Resource Growth at Bachelor and Moroy, 100% owned Deposits and Provides Corporate Updates” for further details. Marc-André Pelletier, P. Eng., President and CEO of the Company, and a qualified person within the meaning of National Instrument 43-101 – Standards of Disclosure for Mineral Projects, reviewed and approved the scientific and technical information contained in this news release.

FOR ADDITIONAL INFORMATION

Cesar Gonzalez, Executive Chairman & Interim CEO
ir@btrgold.com

2872 Sullivan Road, Suite 2, Val d’Or, Québec J9P 0B9

819-825-8678 | Website: www.btrgold.com

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Caution regarding forward-looking statements

This news release contains forward-looking statements within the meaning of applicable securities laws. All statements other than statements of historical fact may be forward-looking and are often identified by words such as “may”, “will”, “plan”, “expect”, “anticipate”, “estimate”, and “intend”. Forward-looking statements in this news release include, without limitation, statements regarding the continued advancement of the Phoenix JV, the potential significance of the Uukiimau Agreement for the broader Urban-Barry camp, and expectations regarding responsible resource development, environmental stewardship, community engagement and Indigenous partnerships in the region.

These statements are based on assumptions considered reasonable by management, including assumptions regarding exploration plans, budgets, schedules, regulatory approvals, and the continued advancement of work by Gold Fields. However, forward-looking statements involve known and unknown risks, uncertainties, and other factors that may cause actual results to differ materially. Such risks include, but are not limited to, changes to exploration plans, results that differ from expectations, operational or permitting challenges, the ability of the parties to complete the Joint Venture, the timing and completion of earn-in expenditures, the speculative nature of mineral exploration, commodity price fluctuations, and the availability of financing. Additional information regarding risks can be found in the Company’s filings at www.sedarplus.ca. 

Readers are cautioned not to place undue reliance on forward-looking statements. The Company does not undertake to update any forward-looking statement except as required by applicable securities laws. All forward-looking statements in this release are expressly qualified by this cautionary statement.

Val-d’Or, QC – May 19, 2026 – Bonterra Resources Inc. (TSX-V: BTR, OTCQX: BONXF, FSE: 9BR2) (“Bonterra” or the “Company”) is pleased to announce that it has filed the NI 43-101 Technical Report (the “Report”) supporting the Mineral Resource Estimates for the Bachelor and Moroy Deposits.

The Report is titled “Updated Mineral Resource Estimate and Technical Report of The Bachelor and Moroy Deposits, Desmaraisville South Project, Northern Québec, Canada”. The Report was prepared by Antoine Yassa, P. Geo, OGQ, of P&E Mining Consultants Inc. (“P&E”) based in Brampton, Ontario, Canada. The Report was independently prepared by P&E on behalf of the Company in accordance with National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”) and is effective as of February 18, 2026.

The Report is available on the Company’s website at www.btrgold.com and on SEDAR+ (www.sedarplus.ca) under the Company’s Issuer profile.

Qualified Person

M. Donald Trudel, P. Geo. (OGQ # 813), Director of Geology for the Company, has reviewed and approved the technical information contained in this press release. Mr. Trudel is a Qualified Person as defined by National Instrument 43-101 on standards of disclosure for mineral projects.

ABOUT P&E MINING CONSULTANTS INC.

P&E, established in 2004, provides geological and mine engineering consulting reports, Mineral Resources Estimate technical reports, Preliminary Economic Assessments and Pre-Feasibility Studies. In addition, we are affiliated with major consulting firms for the purposes of joint venturing on Feasibility Studies. Our experience covers over 490 technical reports on diamonds, most metallic deposits including gold, silver, base metals, PGM and iron for both open pit and underground deposits. Software packages utilized include Gemcom, Leapfrog, Whittle, NPV Scheduler, Vulcan, Ventsim, AutoCAD and Deswik. P&E’s 22 associates have experience in geological interpretation, 3D geological modelling, technical report writing, Mineral Resources and Mineral Reserves Estimates, property evaluations, mine design, production scheduling, operating and capital cost estimates, and metallurgical engineering.

ABOUT BONTERRA

Bonterra is a Canadian gold exploration company with a portfolio of advanced exploration assets anchored by a central milling facility in Québec, Canada. The Company’s assets include the Gladiator, Barry⁽¹⁾, Moroy, and Bachelor⁽²⁾,  gold deposits, which collectively hold 16.8 million tonnes (“Mt”) at an average grade of 3.02 g/t Au for 1.63 million ounces (“Moz”) of Measured and Indicated Mineral Resources, plus 15.6 Mt at an average grade of 4.32 g/t Au for 2.17 Moz Au of Inferred Mineral Resources.

In November 2023, the Company entered into an earn-in and joint venture agreement with Osisko Mining Inc. (“Osisko Mining”) for the Urban-Barry properties (the “JV Agreement”), which include the Gladiator and Barry deposits. In October 2024, Gold Fields Ltd, through a wholly owned Canadian subsidiary, completed the acquisition of Osisko Mining for C$2.16 billion. Gold Fields is now the counterparty to the JV Agreement and can continue to earn a 70% interest in the joint venture by incurring C$30 million in work expenditures on or before November 2026 (including expenditures incurred by Osisko Mining prior to October 2024). This strategic transaction highlights Bonterra’s dedication to advancing its exploration assets, marking a significant step towards development.

⁽¹⁾ See our press release from February 23, 2026, titled “Bonterra Reports Significant Mineral Resources Growth at Barry and Gladiator Deposits” for further details.

⁽²⁾ See our press release from April 1, 2026, titled “Bonterra Reports Significant Mineral Resource Growth at Bachelor and Moroy, 100% owned Deposits and Provides Corporate Updates” for further details.

FOR ADDITIONAL INFORMATION

Cesar Gonzalez, Executive Chairman & Interim CEO
ir@btrgold.com

2872 Sullivan Road, Suite 2, Val d’Or, Québec J9P 0B9

819-825-8678 | Website: www.btrgold.com

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Caution regarding forward-looking statements

This news release contains forward-looking statements within the meaning of applicable securities laws. All statements other than statements of historical fact may be forward-looking and are often identified by words such as “may”, “will”, “plan”, “expect”, “anticipate”, “estimate”, and “intend”. Forward-looking statements in this release include, without limitation, regarding the renewal of the Mining Lease 886, the 2026 exploration program at Desmaraisville South and at the Phoenix JV, including planned drilling activities, deep-drilling objectives at the Barry deposit, proposed camp upgrades, and Gold Fields’ ability to complete the remaining earn-in expenditures under the JV Agreement and the proposed use of proceeds of the Credit Facility and the potential issuance of Shares in satisfaction of interest or the Commitment Fee.

These statements are based on assumptions considered reasonable by management, including assumptions regarding exploration plans, budgets, schedules, regulatory approvals, and the continued advancement of work by Gold Fields. However, forward-looking statements involve known and unknown risks, uncertainties, and other factors that may cause actual results to differ materially. Such risks include, but are not limited to, changes to exploration plans, results that differ from expectations, operational or permitting challenges, the ability of the parties to complete the Joint Venture, the timing and completion of earn-in expenditures, the speculative nature of mineral exploration, commodity price fluctuations, and the availability of financing. Additional information regarding risks can be found in the Company’s filings at www.sedarplus.ca.

Readers are cautioned not to place undue reliance on forward-looking statements. The Company does not undertake to update any forward-looking statement except as required by applicable securities laws. All forward-looking statements in this release are expressly qualified by this cautionary statement.

Val-d’Or, QC – May 13, 2026 – Bonterra Resources Inc. (TSX-V: BTR, OTCQX: BONXF, FSE: 9BR2) (the “Company”) announces that Marc-André Pelletier has tendered his resignation as President, Chief Executive Officer and a Director of the Company, effective May 31, 2026 in order to pursue another opportunity.

To support an orderly transition, Mr. Pelletier has agreed to remain engaged with the Company as a consultant through December 31, 2026. 

“On behalf of the Board, I would like to thank Marc-André for his many contributions to Bonterra” said Mr. Cesar Gonzalez, Chairman of the Board of the Company. “We also appreciate his continued support through the end of the year and wish him tremendous success in his next chapter.”

The Board of Directors will initiate a search process to identify a new Chief Executive Officer and will consider both internal and external candidates. In the interim, Cesar Gonzalez has been appointed as Interim CEO and the Board will work closely with management to ensure continuity during the transition. The Company’s strategic priorities and operations remain unchanged.

The Company will provide further updates as appropriate.

FOR ADDITIONAL INFORMATION

Cesar Gonzalez, Chairman of the Board
ir@btrgold.com

2872 Sullivan Road, Suite 2, Val d’Or, Quebec J9P 0B9

819-825-8678 | Website: www.btrgold.com

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Forward-Looking Information

This news release contains forward-looking statements and forward-looking information within the meaning of applicable securities laws. All statements other than statements of historical fact may be forward-looking statements or information. Forward-looking statements are frequently identified by such words as “may”, “will”, “plan”, “expect”, “anticipate”, “estimate”, “intend” and similar words referring to future events and results. The forward-looking statements and information are based on certain key expectations and assumptions made by management of the Company. Forward-looking statements made in this news release include statements regarding the Company’s search process to identify a new Chief Executive Officer, the anticipated consulting engagement with Mr. Pelletier through December 31, 2026, and the interim leadership arrangements for the Company.

In making these statements, management has relied on a number of assumptions, including that the CEO search process will proceed as anticipated and that Mr. Pelletier will fulfill his consulting obligations during the transition period. Although management of the Company believes that the expectations and assumptions on which such forward-looking statements and information are based are reasonable, undue reliance should not be placed on the forward-looking statements and information since no assurance can be given that they will prove to be correct.

Forward-looking statements and information are provided for the purpose of providing information about the current expectations and plans of management of the Company relating to the future. Readers are cautioned that reliance on such statements and information may not be appropriate for other purposes, such as making investment decisions. Actual results could differ materially from those currently anticipated due to a number of factors and risks. Accordingly, readers should not place undue reliance on the forward-looking statements and information contained in this news release. Readers are cautioned that the foregoing list of factors is not exhaustive. The forward-looking statements and information contained in this news release are made as of the date hereof and no undertaking is given to update publicly or revise any forward-looking statements or information, whether as a result of new information, future events or otherwise, unless so required by applicable securities laws. The forward-looking statements or information contained in this news release are expressly qualified by this cautionary statement.

Val-d’Or, QC – May 4th, 2026 – Bonterra Resources Inc. (TSX-V: BTR, OTCQX: BONXF, FSE: 9BR2) (“Bonterra” or the “Company”) is pleased to announce the inclusion of Mining Lease 886 (the “Barry Mining Lease“) in the Phoenix JV (the “Project”). The Project is under a definitive earn-in and joint venture agreement (the “JV Agreement”) with a subsidiary of Gold Fields Limited (“Gold Fields”) (see press release dated November 28, 2023). The Barry Mining Lease has been included in the Project following an election by Gold Fields for no additional consideration pursuant to the provisions of the JV Agreement.

Cesar Gonzalez, Executive Chairman commented: “The inclusion of the Barry Mining Lease marks another important milestone for the Phoenix JV and supports the continued advancement of the Barry project under the leadership of our partner, Gold Fields. Since the start of the year, the Barry site has seen significant activity, including camp upgrades and expansion, as well as the launch of the 2026 drilling campaign targeting deeper mineralization at the Barry deposit.”

Mining Lease 886

The Company currently maintains the Mining Lease 886 for the extraction of 1.2 million tonnes by open pit and/or underground methods with existing infrastructure and an underground exploration ramp to 100 meters below surface pursuant to previous workings (see Figure 1).  The Mining Lease 886 is valid until 2028 and is renewable for 10 years subject to certain conditions.

Figure 1: Phoenix JV – Surface Plan View with Barry Mining Lease

Barry Project Highlights

The Mineral Resource Estimate (the “2026 MRE”, press release dated February 23, 2026) contains Open Pit resources of 7.794 million tonnes at 1.67 g/t Au for 417 thousand ounces (“koz”) of Measured and Indicated and 0.125 million tonnes at 2.32 g/t Au for 9 koz of Inferred mineral resources. The Barry Underground contains 4.092 million tonnes at 3.47 g/t Au for 457 koz of Measured and Indicated and 8.789 million tonnes at 3.41 g/t Au for 962 koz Au of Inferred mineral resources

The Barry deposit is characterized by three dominant sets of structures, all dipping to the southeast.  The sub-vertical shear zones and the H-Series shear zones dipping 25 to 40 degrees are hosted within intermediate to mafic volcanics and tuffs with local felsic intrusions. Contact zones dip at 50 to 65 degrees along the lower and upper contacts of the D1, D2 and D3 felsic intrusions with mafic volcanics. Gold mineralization is associated with disseminated sulfides within shear zones and veins with local visible gold. The Barry deposit has been delineated over 1.4 kilometres along strike and 700 m vertically and remains open for further expansion.

Phoenix JV

Under the JV Agreement, Gold Fields has the right to acquire a 70% interest in the Project by spending C$30 million in work expenditures, with a minimum spending commitment of C$10 million per year over a three-year period (see press release dated November 28, 2023).

This news release, including the Mineral Resource Estimates disclosed herein, has been prepared solely by the Company and is based on information available to the Company as of the date hereof. Neither Gold Fields Limited nor its affiliate Windfall Mining Group Inc. has verified, approved, or endorsed the Mineral Resource Estimates or the content of this news release, and no representation or warranty is made by Gold Fields Limited or Windfall Mining Group Inc. with respect thereto. References to the Phoenix JV are provided for contextual purposes only and should not be construed as statements made by, or on behalf of, Gold Fields Limited or Windfall Mining Group Inc.

Qualified Person

M. Donald Trudel, P.Geo. (OGQ # 813), Director Geology for the Company, has reviewed and approved the technical information contained in this press release. Mr. Trudel is a qualified person as defined by National Instrument 43-101 on standards of disclosure for mineral projects.

ABOUT BONTERRA

Bonterra is a Canadian gold exploration company with a portfolio of advanced exploration assets anchored by a central milling facility in Québec, Canada. The Company’s assets include the Gladiator, Barry⁽¹⁾, Moroy, and Bachelor⁽²⁾

gold deposits, which collectively hold 16.8 million tonnes (“Mt”) at an average grade of 3.02 g/t Au for 1.63 million ounces (“Moz”) of Measured & Indicated Mineral Resources, plus 15.6 Mt at an average grade of 4.32 g/t Au for 2.17 Moz Au of Inferred Mineral Resources.

In November 2023, the Company entered into an earn-in and joint venture agreement with Osisko Mining Inc. (“Osisko Mining”) for the Urban-Barry properties (the “JV Agreement”), which include the Gladiator and Barry deposits. In October 2024, Gold Fields, through a wholly owned Canadian subsidiary, completed the acquisition of Osisko Mining for C$2.16 billion. Gold Fields is now the counterparty to the JV Agreement and can continue to earn a 70% interest in the joint venture by incurring C$30 million in work expenditures on or before November 2026 (including expenditures incurred by Osisko Mining prior to October 2024). This strategic transaction highlights Bonterra’s dedication to advancing its exploration assets, marking a significant step towards development.

(1)           See news release of the Company dated February 23, 2026 and titled “Bonterra Reports Significant Mineral Resources Growth at Barry and Gladiator Deposits” for further details.

(2)           See news release of the Company dated April 1st, 2026 and titled “Bonterra Reports Significant Mineral Resource Growth at Bachelor and Moroy, 100% owned Deposits and Provides Corporate Updates” for further details. Marc-André Pelletier, P. Eng., President and CEO of the Company, and a qualified person within the meaning of National Instrument 43-101 – Standards of Disclosure for Mineral Projects, reviewed and approved the scientific and technical information contained in this news release.

FOR ADDITIONAL INFORMATION

Marc-André Pelletier, President & CEO
ir@btrgold.com

2872 Sullivan Road, Suite 2, Val d’Or, Québec J9P 0B9

819-825-8678 | Website: www.btrgold.com

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Caution regarding forward-looking statements

This news release contains forward-looking statements within the meaning of applicable securities laws. All statements other than statements of historical fact may be forward-looking and are often identified by words such as “may”, “will”, “plan”, “expect”, “anticipate”, “estimate”, and “intend”. Forward-looking statements in this news release include, without limitation, statements regarding the renewal of the Mining Lease 886, the 2026 exploration program at the Phoenix JV, including planned drilling activities, deep-drilling objectives at the Barry deposit, proposed camp upgrades, and Gold Fields’ ability to complete the remaining earn-in expenditures under the JV Agreement and the proposed use of proceeds of the Credit Facility and the potential issuance of Shares in satisfaction of interest or the Commitment Fee.

These statements are based on assumptions considered reasonable by management, including assumptions regarding exploration plans, budgets, schedules, regulatory approvals, and the continued advancement of work by Gold Fields. However, forward-looking statements involve known and unknown risks, uncertainties, and other factors that may cause actual results to differ materially. Such risks include, but are not limited to, changes to exploration plans, results that differ from expectations, operational or permitting challenges, the ability of the parties to complete the Joint Venture, the timing and completion of earn-in expenditures, the speculative nature of mineral exploration, commodity price fluctuations, and the availability of financing. Additional information regarding risks can be found in the Company’s filings at www.sedarplus.ca.

Readers are cautioned not to place undue reliance on forward-looking statements. The Company does not undertake to update any forward-looking statement except as required by applicable securities laws. All forward-looking statements in this release are expressly qualified by this cautionary statement.

Val-d’Or, QC – April 13, 2026 – Bonterra Resources Inc. (TSX-V: BTR, OTCQX: BONXF, FSE: 9BR2) (“Bonterra” or the “Company”) is pleased to present its 2026 exploration plans at its 100% owned Desmaraisville South Project (the “Project”). Bonterra is planning a 10,000 to 12,000 meters (“m”) diamond drill program starting mid-April and followed by other exploration programs to be completed by year-end (See Figure 1, which highlights the targeted areas). 

Marc-André Pelletier, President and CEO commented: “At our 100% owned Desmaraisville South Project, the 2026 exploration program is designed, among other objectives, to test deep targets on the eastern side of the O’Brien intrusive, which hosts the Bachelor and Moroy deposits. Additional targets will also be evaluated near the Bachelor Mill, the only fully permitted processing facility in the region. The recent update to the Mineral Resource Estimates for the Bachelor and Moroy deposits, together with the 2026 exploration campaign, underscores the Company’s commitment to advancing the Desmaraisville project toward a mining restart while maximizing the use of its existing permitted infrastructure.”

2026 Exploration Plans

• Drill 10,000 to 12,000 m near the Bachelor Mill Complex, including the Mistik 13 Zone, the Hewfran Zone, the Deep Drilling Targets adjacent to the O’Brien Intrusive on the East, the Céré and, Murgor Showings to the South and other targets.
• Carry out field work, focusing on mapping and rock geochemical sampling.
• Conduct a resampling program on the historic Hewfran, Bachelor and Moroy drill core.
• Complete a 3D inversion model with geological constraints of the 2023 gravimetric geophysical survey.
• Further advance the permitting process at the Comex to increase throughput at the Bachelor Mill and expand the capacity of the tailings management area.

Figure 1: Desmaraisville South Project – Prospective Drill Targets, 2026 diamond drill campaign

O’Brien Intrusive Deep Drilling Target

The Company is planning a deep drilling program to test potential gold targets around the O’Brien intrusive, which hosts the Bachelor and Moroy deposits on the Western side (see Figure 2). The program aims to evaluate potential of new gold mineralization on the eastern side of the intrusive, with drilling targeting an approximate vertical depth of 900 m. 

Figure 2: Desmaraisville South Project – O’Brien Deep Target – Plan and Section Views

Highlights of the field work and resampling program

Field work at Desmaraisville South will begin this summer to better evaluate high-grade gold showings located within the Opawica-Guercheville and Wedding-Lamarck corridor of deformation. This program will also complete the evaluation of 1) near-surface gold-bearing structures, 2) low-gravity anomalies which may be related to felsic intrusions, and 3) the re-sampled historical trenches.

A relogging and sampling program is planned for all historical drill core from the Hewfran, Bachelor, and Moroy deposits. This program will include an adequate sampling of intervals with economic grades that have not been sampled previously.

Laurentia Exploration based in Jonquière, Québec, has been contracted to carry out a metallogenic and structural study on the Desmaraisville South Property. The objective of this study is to better define the structural controls of gold mineralization on known deposits and ultimately to improve the quality of our future drill targets.

Sander Geophysics based in Ottawa, Ontario, was commissioned to generate a 3D inversion model of 2023 gravimetric data to model three-dimensional volumes that could correspond to late intrusions such as the O’Brien intrusion which hosts the Bachelor and Moroy deposits.

LithologIQ based in Montréal, Québec, has been mandated to process 20,000 m of drill core using their hyperspectral core scanning technology. Historic and recent drill core from all gold mineralized environments at the Project will be scanned directly at the mine site. The recognition of minerals associated with gold-bearing environments will allow for the rapid identification of new areas with high potential during a drilling campaign.

Qualified Person

M. Donald Trudel, P.Geo. (OGQ # 813), Director Geology for the Company, oversees all exploration activities on the Desmaraisville Property and has compiled and approved the information contained in this press release. Mr. Trudel is a qualified person as defined by National Instrument 43-101 on standards of disclosure for mineral projects.

About Bonterra Resources Inc. 

Bonterra is a Canadian gold exploration company with a portfolio of advanced exploration assets anchored by a central milling facility in Québec, Canada. The Company’s assets include the Gladiator, Barry⁽¹⁾, Moroy, and Bachelor⁽²⁾ gold deposits, which collectively hold 16.8 million tonnes (“Mt”) at an average grade of 3.02 g/t Au for 1.63 million ounces (“Moz”) of Measured & Indicated Mineral Resources, plus 15.6 Mt at 4.32 g/t Au for 2.17 Moz of Inferred Mineral Resources.

In November 2023, the Company entered into an earn-in and joint venture agreement with Osisko Mining Inc. (“Osisko Mining”) for the Urban-Barry properties (the “JV Agreement”), which include the Gladiator and Barry deposits. In October 2024, Gold Fields Ltd, through a wholly owned Canadian subsidiary, completed the acquisition of Osisko Mining for C$2.16 billion. Gold Fields is now the counterparty to the JV Agreement and can continue to earn a 70% interest in the joint venture by incurring C$30 million in work expenditures on or before November 2026 (including expenditures incurred by Osisko Mining prior to October 2024). This strategic transaction highlights Bonterra’s dedication to advancing its exploration assets, marking a significant step towards development.

(1) See news release of the Company dated February 23, 2026, and titled “Bonterra Reports Significant Mineral Resources Growth at Barry and Gladiator Deposits” for further details. 

(2) See news release of the Company dated April 1st, 2026, and titled “Bonterra Reports Significant Mineral Resource Growth at Bachelor and Moroy, 100% owned Deposits and Provides Corporate Updates” for further details. 

FOR ADDITIONAL INFORMATION

 Marc-André Pelletier, President & CEO 

ir@btrgold.com

2872 Sullivan Road, Suite 2, Val d’Or, Québec J9P 0B9
819-825-8678 | Website: www.btrgold.com

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release. 

Caution regarding forward-looking statements 

This news release contains forward-looking statements within the meaning of applicable securities laws. All statements other than statements of historical fact may be forward-looking and are often identified by words such as “may”, “will”, “plan”, “expect”, “anticipate”, “estimate”, and “intend”. Forward-looking statements in this release include, without limitation, statements regarding, the 2026 exploration program at the Desmaraisville South and at Phoenix JV, including planned drilling activities, deep-drilling objectives at the Barry deposit, proposed camp upgrades, and Gold Fields’ ability to complete the remaining earn-in expenditures under the JV Agreement.

These statements are based on assumptions considered reasonable by management, including assumptions regarding exploration plans, budgets, schedules, regulatory approvals, and the continued advancement of work by Gold Fields. However, forward-looking statements involve known and unknown risks, uncertainties, and other factors that may cause actual results to differ materially. Such risks include, but are not limited to, changes to exploration plans, results that differ from expectations, operational or permitting challenges, the ability of the parties to complete the Joint Venture, the timing and completion of earn-in expenditures, the speculative nature of mineral exploration, commodity price fluctuations, and the availability of financing. Additional information regarding risks can be found in the Company’s filings at www.sedarplus.ca. 

Readers are cautioned not to place undue reliance on forward-looking statements. The Company does not undertake to update any forward-looking statement except as required by applicable securities laws. All forward-looking statements in this release are expressly qualified by this cautionary statement.

Val-d’Or, QC – April 9, 2026 – Bonterra Resources Inc. (TSX-V: BTR, OTCQX: BONXF, FSE: 9BR2) (“Bonterra” or the “Company”) is pleased to announce that it has filed the NI 43-101 technical report (the “Report”) supporting the Mineral Resource Estimates for the Barry and Gladiator deposits. 

The Report is titled “Updated Mineral Resource Estimate and Technical Report on the Barry and Gladiator Gold Properties, Phoenix Joint Venture Project, Northern Québec, Canada.” The Report was prepared by Antoine Yassa, P. Geo, OGQ, of P&E Mining Consultants Inc. (“P&E”) based in Brampton, Ontario, Canada. The Report was independently prepared by P&E on behalf of the Company in accordance with National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”) and is effective as of February 18, 2026.

The Report is available on the Company’s website at www.btrgold.com and on SEDAR+ (www.sedarplus.ca) under the Company’s Issuer profile.

Qualified Person

M. Donald Trudel, P. Geo. (OGQ # 813), Director of Geology for the Company, has reviewed and approved the technical information contained in this press release. Mr. Trudel is a Qualified Person as defined by National Instrument 43-101 on standards of disclosure for mineral projects.

ABOUT P&E MINING CONSULTANTS INC.

P&E, established in 2004, provides geological and mine engineering consulting reports, Mineral Resources Estimate technical reports, Preliminary Economic Assessments and Pre-Feasibility Studies. In addition, we are affiliated with major consulting firms for the purposes of joint venturing on Feasibility Studies. Our experience covers over 480 technical reports on diamonds, most metallic deposits including gold, silver, base metals, PGM and iron for both open pit and underground deposits. Software packages utilized include Gemcom, Leapfrog, Whittle, NPV Scheduler, Vulcan, Ventsim, AutoCAD and Deswik. P&E’s 22 associates have experience in geological interpretation, 3D geological modelling, technical report writing, Mineral Resources and Mineral Reserves Estimates, property evaluations, mine design, production scheduling, operating and capital cost estimates, and metallurgical engineering.

ABOUT BONTERRA

Bonterra is a Canadian gold exploration company with a portfolio of advanced exploration assets anchored by a central milling facility in Québec, Canada. The Company’s assets include the Gladiator, Barry⁽¹⁾, Moroy, and Bachelor⁽²⁾,  gold deposits, which collectively hold 16.8 million tonnes (“Mt”) at an average grade of 3.02 g/t Au for 1.63 million ounces (“Moz”) of Measured and Indicated Mineral Resources, plus 15.6 Mt at an average grade of 4.32 g/t Au for 2.17 Moz Au of Inferred Mineral Resources.

In November 2023, the Company entered into an earn-in and joint venture agreement with Osisko Mining Inc. (“Osisko Mining”) for the Urban-Barry properties (the “JV Agreement”), which include the Gladiator and Barry deposits. In October 2024, Gold Fields Ltd, through a wholly owned Canadian subsidiary, completed the acquisition of Osisko Mining for C$2.16 billion. Gold Fields is now the counterparty to the JV Agreement and can continue to earn a 70% interest in the joint venture by incurring C$30 million in work expenditures on or before November 2026 (including expenditures incurred by Osisko Mining prior to October 2024). This strategic transaction highlights Bonterra’s dedication to advancing its exploration assets, marking a significant step towards development.

⁽¹⁾ See our press release from February 23, 2026, titled “Bonterra Reports Significant Mineral Resources Growth at Barry and Gladiator Deposits” for further details.

⁽²⁾ See our press release from April 1, 2026, titled “Bonterra Reports Significant Mineral Resource Growth at Bachelor and Moroy, 100% owned Deposits and Provides Corporate Updates” for further details.

FOR ADDITIONAL INFORMATION

Marc-André Pelletier, President & CEO
ir@btrgold.com

2872 Sullivan Road, Suite 2, Val d’Or, Québec J9P 0B9

819-825-8678 | Website: www.btrgold.com

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Caution regarding forward-looking statements

This news release contains forward-looking statements within the meaning of applicable securities laws. All statements other than statements of historical fact may be forward-looking and are often identified by words such as “may”, “will”, “plan”, “expect”, “anticipate”, “estimate”, and “intend”. Forward-looking statements in this release include, without limitation, planned drilling activities at Bachelor and Moroy, deep-drilling objectives at the Barry deposit, and Gold Fields’ ability to complete the remaining earn-in expenditures under the JV Agreement.

These statements are based on assumptions considered reasonable by management, including assumptions regarding exploration plans, budgets, schedules, regulatory approvals, and the continued advancement of work by Gold Fields. However, forward-looking statements involve known and unknown risks, uncertainties, and other factors that may cause actual results to differ materially. Such risks include, but are not limited to, changes to exploration plans, results that differ from expectations, operational or permitting challenges, the ability of the parties to complete the Joint Venture, the timing and completion of earn-in expenditures, the speculative nature of mineral exploration, commodity price fluctuations, and the availability of financing. Additional information regarding risks can be found in the Company’s filings at www.sedarplus.ca. 

Readers are cautioned not to place undue reliance on forward-looking statements. The Company does not undertake to update any forward-looking statement except as required by applicable securities laws. All forward-looking statements in this release are expressly qualified by this cautionary statement.

Val-d’Or, QC – April 1st, 2026 – Bonterra Resources Inc. (TSX-V: BTR, OTCQX: BONXF, FSE: 9BR2) (“Bonterra” or the “Company”) is pleased to announce updated Mineral Resource Estimates (the “2026 MREs”) for the Bachelor and Moroy Deposits at its 100% owned Desmaraisville Gold Project. The 2026 MREs were independently prepared by P&E Mining Consultants Inc. (“P&E”) on behalf of the Company in accordance with National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”) and are effective as of February 18, 2026.

Key Highlights

• Bachelor and Moroy combined 2026 MREs of 228 thousand ounces (“koz”) of Measured & Indicated Mineral Resources at an average grade of 3.98 g/t Au contained within 1.78 million tonnes (“Mt”), and
  133 koz of Inferred Mineral Resources at an average grade of 4.23 g/t Au contained within 0.978 Mt.
• Combined contained gold ounces increased by 42% in Measured & Indicated Mineral Resources and by 28% in Inferred Mineral Resources relative to the 2021 Mineral Resource Estimates (the “2021 MREs”).
• Bachelor MREs (Underground): 113 koz of Measured & Indicated Mineral Resources grading 3.87 g/t Au within 0.905 Mt, and 28 koz of Inferred Mineral Resources grading 4.45 g/t Au within 0.197 Mt.
• Moroy MREs (Underground): 115 koz of Measured & Indicated Mineral Resources grading 4.10 g/t Au within 0.875 Mt, and 105 koz of Inferred Mineral Resources grading 4.18 g/t Au within 0.781 Mt.

Marc-André Pelletier, President and CEO commented: “The discovery of the extension of the Hewfran mineralized zone last year, combined with the additional drilling completed since 2021, has enabled P&E to estimate these updated MREs for the Bachelor and Moroy Deposits, owned at 100%. The increase in MREs on our mining concession and mining lease, located near the Bachelor Mill, is significant, with now more than 113,000 ounces of gold in the Measured & Indicated category. Importantly, all Mineral Resources are located within 900 metres of the Bachelor Mill Complex, thereby offering a strategic opportunity to advance the restart of mining operations by leveraging already permitted infrastructure. The Company intends to begin its 2026 exploration program at Desmaraisville soon, which will aim to continue testing high-potential targets.”

2026 MREs Details & Assumptions

Data Analysis

• The 2026 MREs include new drilling completed by Bonterra from 2023 to 2025, including 9,799 m drilled containing 3,197 assays at Bachelor and 7,962 m drilled containing 1,663 assays at Moroy. 
• A total of 2,432 drill holes and 379,577 m drilled containing 60,436 assays are considered for the Bachelor Deposit and 579 drill holes and 150,886 m drilled containing 18,185 assays for the Moroy Deposit.
• Revision of the capping threshold for mineralized zones based on geological and structural groupings.
• A more robust classification strategy based on field observations, historical mine records, oriented drill core and detailed variography.

Geology Interpretation and Modelling

• Revised modelling interpretations resulting from oriented core drilling, including the new delineated Hewfran Zone, and Bachelor wireframes showing increased deposit understanding over 2021.
• Revised modelling interpretations and cut-off resulting from increased gold price.
• Increased minimum mining width from 1.20 m to 1.75 m now more closely aligned with industry standards.
• All blocks within the 2026 underground MREs are constrained by optimized stope shapes as recommended by the CIM Estimation of Mineral Resources and Mineral Reserves Best Practice Guidelines.

The table below shows the comparison between the 2021 and 2026 MREs: 

Table 1: Bachelor and Moroy deposits – Comparison of Mineral Resources in 2021 MREs with 2026 MREs^(1-6)

Notes:

1. 2021 MREs are estimated using a cut-off grade of 2.6 g/t Au for underground. 
2. 2021 underground MREs were not constrained by stope shapes.
3. 2026 MREs are estimated using a cut-off grade of 2.0 g/t Au for underground stopes that constrain all blocks being reported.
4. 2021MREs and 2026 MREs are estimated using long-term gold prices of US$1,600 per oz and US$2,850 per oz, respectively.
5. Exchange rates used were US$/C$ of 0.75 for the 2021 MREs and 0.72 for the 2026 MREs.
6. Numbers may not sum due to rounding.

Bachelor Deposit MRE

The Bachelor MRE is based on 31 veins grouped within four steeply dipping vein sets from the surface to 1,000 m in depth, within which 1 m capped composites have been calculated and grade blocks estimated with a multi-pass inverse distance cubed (“ID3”) interpolation method (see Table 2). Measured Mineral Resources were defined where proximal to historical workings and using three drill holes spaced up to 15 m apart. Indicated Mineral Resources were limited to areas defined using three drill holes spaced up to 30 m apart. Inferred Mineral Resources represent areas with drill hole spacing up to 60 m. Mineral Resources are reported within underground reporting optimized stope shapes constructed using a minimum thickness of 1.75 m and a gold cut-off grade of 2.0 g/t Au and limited to areas of continuous mineralization. Mineral Resources were depleted within 5 m of historical mined out stopes. In addition, a 2 m buffer solid was created around all mineralized wireframes to capture any marginal grade for underground stope optimization internal dilution. All blocks within the underground constraining optimized stope shapes have been included within the Mineral Resources Estimate at a zero cut-off grade.

Table 2: Bachelor Deposit 2026 MREs^(1-12)

Notes:

1. CIM definitions were followed for Mineral Resources.
2. Mineral Resources are presented externally undiluted and in situ and are considered to have reasonable prospects for eventual economic extraction. The underground Mineral Resources are constrained by potentially mineable stope shapes.
3. Underground Mineral Resources stope shapes are optimized at a cut-off of 2.0 g/t Au.
4. Mineral Resources are estimated using a long-term gold price of US$2,850 per oz and a US$/C$ exchange rate of 0.72. 
5. A minimum mining width of 1.75 m was used.
6. Mineral Resources were depleted within 5 m of historical mined out stopes.
7. Assay samples were composited within the mineralization envelopes into 1 m length composites. A value of
   0.001 g/t Au was applied in cases of drill core not assayed.
8. High-grade outliers were established using a statistical analysis on a per-zone basis for gold on composite data.
   Capping varied from 40 to 45 g/t Au and was applied on composites within each specific wireframe.
9. Bulk density values were applied on the different mineralized zones varied from 2.79 to 2.82 t/m³ based on site drill core measurements with a mean value of 2.81 t/m³ used for reporting purposes.
10. ID3 block grade interpolation was used.
11. Grade estimates are based on a parent block dimension of 2 m x 4 m x 4 m with sub-cells down to 0.25 m x 1 m x 1 m. Search parameters were determined by variography.
12. Numbers may not sum due to rounding.

Figure 1: Bachelor 2026 MRE Longitudinal Projection View Looking Northeast 

Moroy Deposit MRE

The Moroy MRE is based on 11 vein structures and clusters within two structural groups. Block model grade estimates are controlled by the geological/vein interpretations and were completed using a three-pass ID3 block grade interpolation method and capped 1 m composites (see Table 3). Measured Mineral Resources were defined using three drill holes spaced up to 15 m apart. Indicated Mineral Resources are limited to areas defined using three drill holes spaced up to 30 m apart. Inferred Mineral Resources represent areas with drill hole spacing and extrapolation up to 60 m. Mineral Resources are reported within underground reporting shapes constructed using a minimum thickness of 1.75 m and a cut-off grade of 2.0 g/t Au, limited to areas of continuous mineralization. Mineral Resources were depleted within 5 m of historical mined out stopes. In addition, a 2 m buffer solid was created around all mineralized wireframes to capture any marginal grade for underground stope optimization internal dilution. All blocks within the underground constraining optimized stope shapes have been included within the Mineral Resources Estimate at a zero cut-off grade. Grade blocks within a 50 m crown pillar below the base of overburden has been excluded from the Mineral Resources.

Table 3: Moroy Deposit 2026 MREs^(1-13)

Notes:

1. CIM definitions were followed for Mineral Resources.
2. Mineral Resources are presented externally undiluted and in situ and are considered to have reasonable prospects for eventual economic extraction. The Underground Mineral Resources are constrained by potentially mineable stope shapes.
3. Underground Mineral Resources are estimated at a cut-off of 2.0 g/t Au.
4. Mineral Resources are estimated using a long-term gold price of US$2,850 per oz and a US$/C$ exchange rate of 0.72. 
5. A minimum mining width of 1.75 m was used.
6. Mineral Resources were depleted within 5 m of historical mined out stopes.
7. Assay Samples were composited within the mineralization envelopes into 1 m length composites. A value of 0.001 g/t Au was applied in cases of drill core not assayed.
8. High-grade capping was done on composite data and established using a statistical analysis on a per-zone basis for gold. A 30 g/t Au capping was applied on composites within each specific wireframe.
9. Bulk density values were applied on the different mineralized zones varied from 2.68 to 2.87 t/m³ based on-site drill core measurements with a mean value of 2.80 t/m³ used for reporting purposes.
10. ID3 block grade interpolation was used.
11. Grade estimates are based on a parent block dimension of 2 m x 4 m x 4 m with sub-cells down to 0.25 m x 1 m x 1 m. Search parameters were determined by variography.
12. A 50 m crown pillar was applied at Moroy.
13. Numbers may not sum due to rounding.

Figure 2: Moroy 2026 MRE Longitudinal Projection View Looking Northwest

Summary and Validation

Mineralized domains were initially developed by Bonterra and then reviewed, modified and accepted by P&E.
All Mineral Resource domains were defined within Leapfrog Geo^TM software and sub-block model grade estimates were completed within Leapfrog Edge^TM. Underground constraining shapes at Bachelor and Moroy were optimized using Deswik^TM stope optimizer software. In addition to standard database validation techniques, wireframe and block model validation procedures, including wireframe to block volume confirmation, statistical comparisons with composite and nearest neighbour grade estimates, swath plots, visual reviews in 3D, longitudinal projection, cross-section, and plan views, and cross software reporting confirmation, were completed for all deposits. 

The Qualified Person (“QP”) considers the geological modelling, grade estimation, and Mineral Resources classification considered in these Mineral Resources estimates to be consistent with industry practice and aligned with the CIM Estimation of Mineral Resources and Mineral Reserves Best Practices guidelines, as recommended by Canadian Securities Administrators’ National Instrument 43‑101. Mineral Resources are not Mineral Reserves and do not have demonstrated economic viability.

Further details regarding the 2026 MREs, key assumptions, parameters and methods used to estimate the Mineral Resources of the Bachelor and Moroy Deposits will be available on SEDAR+ (www.sedarplus.ca ) under the Corporation’s issuer profile within 45 days of this news release in accordance with NI 43-101.

Corporate Update

The press release of the Company dated March 23, 2026 disclosed a credit facility (the “Credit Facility“) provided by certain funds managed by Wexford Capital LP in an aggregate amount of C$5,000,000. The Company wishes to provide the following additional disclosure in respect of this unsecured Credit Facility. No bonus securities and/or other finder’s fee will be paid in connection with the Credit Facility, other than the previously disclosed C$100,000 commitment fee.

Independent Qualified Person

The Mineral Resources Estimate was prepared by P&E. The QP has reviewed and approved the content of this news release. Independent QP Antoine Yassa, P. Geo, OGQ of P&E has prepared and supervised the preparation of the technical information relating to this Mineral Resources Estimate.

Bonterra Qualified Person and QAQC

M. Donald Trudel, P. Geo. (OGQ # 813), Director of Geology for the Company, has reviewed and approved the technical information contained in this press release. Mr. Trudel is a Qualified Person as defined by National Instrument 43-101 on standards of disclosure for mineral projects.

The Bachelor and Moroy Project’s drill core gold analyses were performed at the Bachelor Mine Laboratory, Actlabs (at Ste-Germaine-Boulé), AGAT Laboratories and at MSALABS both located in Val d’Or, Québec. The Company’s laboratory and external laboratories employ a rigorous QAQC analysis program that meets industry standards. The analyses were carried out by fire assay with atomic absorption finish at Bachelor Mine Laboratory and with gravimetric finish for assay above 10 g/t Au at Actlabs and AGAT laboratories. Blanks, duplicates, and certified reference materials were inserted into the sample stream to monitor the laboratory’s performance.  At MSALABS laboratory, the samples were crushed to a particle size of 70% passing through a two-millimetre sieve, and then a 500-gram portion was taken for gold analysis by gamma ray (PhotonAssay^TM). As per MSALABS’ internal procedure, blank samples, and certified reference materials were systematically inserted into the sample sequence for analysis. MSALABS operates several laboratories worldwide and holds ISO-17025 accreditation for numerous metal determination methods, including the photon assay method. The Company’s QAQC program requires that at least 5% of samples be analyzed by an independent laboratory. These verification samples were sent to ALS Minerals’ laboratory facility located in Val-d’Or, Québec. The verifications show a high degree of correlation with the Laboratory’s results.

ABOUT P&E MINING CONSULTANTS INC.

P&E, established in 2004, provides geological and mine engineering consulting reports, Mineral Resources Estimate technical reports, Preliminary Economic Assessments and Pre-Feasibility Studies. In addition, we are affiliated with major consulting firms for the purposes of joint venturing on Feasibility Studies. Our experience covers over 480 technical reports on diamonds, most metallic deposits including gold, silver, base metals, PGM and iron for both open pit and underground deposits. Software packages utilized include Gemcom, Leapfrog, Whittle, NPV Scheduler, Vulcan, Ventsim, AutoCAD and Deswik. P&E’s 22 associates have experience in geological interpretation, 3D geological modelling, technical report writing, Mineral Resources and Mineral Reserves Estimates, property evaluations, mine design, production scheduling, operating and capital cost estimates, and metallurgical engineering.

ABOUT BONTERRA

Bonterra is a Canadian gold exploration company with a portfolio of advanced exploration assets anchored by a central milling facility in Québec, Canada. The Company’s assets include the Gladiator, Barry⁽¹⁾, Moroy, and Bachelor gold deposits, which collectively hold 16.8 million tonnes (“Mt”) at an average grade of 3.02 g/t Au for 1.63 million ounces (“Moz”) of Measured & Indicated Mineral Resources, plus 15.6 Mt at an average grade of 4.32 g/t Au for 2.17 Moz Au of Inferred Mineral Resources.

In November 2023, the Company entered into an earn-in and joint venture agreement with Osisko Mining Inc. (“Osisko Mining”) for the Urban-Barry properties (the “JV Agreement”), which include the Gladiator and Barry deposits. In October 2024, Gold Fields Ltd, through a wholly owned Canadian subsidiary, completed the acquisition of Osisko Mining for C$2.16 billion. Gold Fields is now the counterparty to the JV Agreement and can continue to earn a 70% interest in the joint venture by incurring C$30 million in work expenditures on or before November 2026 (including expenditures incurred by Osisko Mining prior to October 2024). This strategic transaction highlights Bonterra’s dedication to advancing its exploration assets, marking a significant step towards development.

⁽¹⁾ See our press release from February 23, 2026, titled “Bonterra Reports Significant Mineral Resources Growth at Barry and Gladiator Deposits” for further details.

FOR ADDITIONAL INFORMATION

Marc-André Pelletier, President & CEO
ir@btrgold.com

2872 Sullivan Road, Suite 2, Val d’Or, Québec J9P 0B9

819-825-8678 | Website: www.btrgold.com

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Caution regarding forward-looking statements

This news release contains forward-looking statements within the meaning of applicable securities laws. All statements other than statements of historical fact may be forward-looking and are often identified by words such as “may”, “will”, “plan”, “expect”, “anticipate”, “estimate”, and “intend”. Forward-looking statements in this release include, without limitation, planned drilling activities at Bachelor and Moroy, deep-drilling objectives at the Barry deposit, and Gold Fields’ ability to complete the remaining earn-in expenditures under the JV Agreement.

These statements are based on assumptions considered reasonable by management, including assumptions regarding exploration plans, budgets, schedules, regulatory approvals, and the continued advancement of work by Gold Fields. However, forward-looking statements involve known and unknown risks, uncertainties, and other factors that may cause actual results to differ materially. Such risks include, but are not limited to, changes to exploration plans, results that differ from expectations, operational or permitting challenges, the ability of the parties to complete the Joint Venture, the timing and completion of earn-in expenditures, the speculative nature of mineral exploration, commodity price fluctuations, and the availability of financing. Additional information regarding risks can be found in the Company’s filings at www.sedarplus.ca. 

Readers are cautioned not to place undue reliance on forward-looking statements. The Company does not undertake to update any forward-looking statement except as required by applicable securities laws. All forward-looking statements in this release are expressly qualified by this cautionary statement.

Val-d’Or, QC – March 23, 2026 – Bonterra Resources Inc. (TSX-V: BTR, OTCQX: BONXF, FSE: 9BR2) (“Bonterra” or the “Company”) is pleased to announce that it has entered into a credit agreement dated March 23, 2026 (the “Credit Agreement”) with Wexford Capital LP (“Wexford Capital”), an insider of the Company, as agent (the“Agent”), and certain funds managed by Wexford Capital as lenders (the “Lenders”), pursuant to which the Lenders have agreed to provide a non-revolving credit facility in an aggregate amount of C$5,000,000 (the “Credit Facility”), to be made available by way of a single advance on the closing date. The advance will bear interest at a rate per annum equal to 8.00% plus the Secured Overnight Financing Rate (“SOFR”) term rate applicable to the six-month period commencing on the closing date and ending on the maturity date of September 23, 2026 (the “Maturity Date”).

Marc-Andre Pelletier, President and CEO commented: “We are grateful for the continued support of Wexford Capital, our largest shareholder, as we navigate the ongoing CRA audit and evaluate strategic alternatives to maximize value for all stakeholders. This credit facility provides important financial flexibility and underscores Wexford’s confidence in Bonterra’s underlying asset base and long-term potential.”

Interest accrued under the Credit Facility is payable in arrears on the date that is six months from the closing date (the “Interest Payment Date”) and, at the Agent’s option, may be paid in cash or in common shares of the Company (“Shares”). If the Agent elects to receive interest in Shares, the number of Shares to be issued will be calculated by dividing the amount of accrued interest payable on the Interest Payment Date by the volume-weighted average trading price (“VWAP”) of the Shares on the TSX Venture Exchange (“TSXV”) for the five trading days immediately preceding the Interest Payment Date.

In consideration of the Lenders arranging and establishing the Credit Facility and the Agent agreeing to act as agent, the Company will pay to the Agent a commitment fee of C$100,000 (the “Commitment Fee”), earned and payable on the Maturity Date. At the Agent’s option, the Commitment Fee may be paid in cash or Shares. If the Agent elects to receive the Commitment Fee in Shares, the number of Shares to be issued will be calculated by dividing the amount of the Commitment Fee by the VWAP of the Shares on the TSXV for the five trading days immediately preceding the Maturity Date.

Notwithstanding the foregoing, no Shares may be issued pursuant to either the interest or Commitment Fee provisions if, upon giving effect to such issuance, the number of Shares beneficially owned or over which control or direction is exercised by the Lenders and/or any person acting jointly or in concert with the Lenders would exceed 19.9% of the issued and outstanding Shares at such time. The issuance of Shares in satisfaction of interest or the Commitment Fee, as applicable, is subject to the approval of the TSXV.

The advance under the Credit Facility will be used by the Company for the purposes of: (i) indemnifying or reimbursing its shareholders who participated in the flow-through private placements completed on December 13, 2019 and October 21, 2021, for taxes imposed prior to the closing date in connection with flow-through share offerings of the Company; and (ii) funding eligible exploration and development expenditures on the Desmaraisville property required to satisfy the Company’s renunciation commitments under applicable flow-through share subscription agreements.

The securities referred to herein have not been, and will not be, registered under the United  States Securities Act of 1933, as amended (the “U.S. Securities Act”), or any U.S. state securities  laws, and may not be offered or sold in the United States or to, or for the account or benefit of, any U.S. persons or any persons within the United States absent registration or available exemptions from the registration requirements of the U.S. Securities Act and applicable U.S. state securities laws. This news release shall not constitute an offer to sell or the solicitation of an offer to buy securities in the United States, nor shall there be any sale of these securities in any jurisdiction in which such offer, solicitation or sale would be unlawful. ‘United States’ and ‘U.S. person’ are as defined in Regulation S under the U.S. Securities Act.

Multilateral Instrument 61-101

The entering into of the Credit Agreement constitutes a “related party transaction” within the meaning of Multilateral Instrument 61-101 – Protection of Minority Security Holders in Special Transactions (“MI 61-101”) as the Agent and the Lenders are related parties of the Company for purposes of MI 61-101.

The Company has relied on the exemptions from the valuation and minority shareholder approval requirements of MI 61-101 contained in sections 5.5(a) and 5.7(1)(a) of MI 61-101 on the basis that the fair market value of the transaction does not exceed 25% of the Company’s market capitalization.

The Company did not file a material change report more than 21 days before the entering into of the Credit Agreement as the terms of the Credit Agreement were not settled until shortly prior to execution and the Company wished to close on an expedited basis for sound business reasons.

ABOUT BONTERRA

Bonterra is a Canadian gold exploration company with a portfolio of advanced exploration assets anchored by a central milling facility in Québec, Canada. The Company’s assets include the Gladiator, Barry, Moroy, and Bachelor gold deposits. The Barry and Gladiator deposits which collectively hold 1.401 million ounces (“Moz”) of Measured & Indicated Mineral Resources at an average grade of 2.90 g/t Au contained within 15.025 million tonnes (“Mt”), plus 2.033 Moz of Inferred Mineral Resources at an average grade of 4.32 g/t Au contained within 14.628 Mt.⁽¹⁾

In November 2023, the Company entered into an earn-in and joint venture agreement with Osisko Mining Inc. (“Osisko Mining”) for the Urban-Barry properties (the “JV Agreement”), which include the Gladiator and Barry deposits. In October 2024, Gold Fields Ltd, through a wholly owned Canadian subsidiary, completed the acquisition of Osisko Mining for C$2.16 billion. Gold Fields is now the counterparty to the JV Agreement and can continue to earn a 70% interest in the joint venture by incurring C$30 million in work expenditures on or before November 2026 (including expenditures incurred by Osisko Mining prior to October 2024). This strategic transaction highlights Bonterra’s dedication to advancing its exploration assets, marking a significant step towards development.

1. See our press release from February 23, 2026 titled “Bonterra Reports Significant Mineral Resources Growth at Barry and Gladiator Deposits” for further details. Marc-André Pelletier, P. Eng., President and CEO of the Company, and a Qualified Person, reviewed and approved the technical information contained in this press release.

FOR ADDITIONAL INFORMATION

Marc-André Pelletier, President & CEO
ir@btrgold.com

2872 Sullivan Road, Suite 2, Val d’Or, Quebec J9P 0B9

819-825-8678 | Website: www.btrgold.com

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Caution regarding forward-looking statements

This news release contains forward‐looking statements and forward‐looking information within the meaning of applicable securities laws. All statements other than statements of historical fact may be forward‐looking statements or information. Forward-looking statements are frequently identified by such words as “may”, “will”, “plan”, “expect”, “anticipate”, “estimate”, “intend” and similar words referring to future events and results. The forward‐looking statements and information are based on certain key expectations and assumptions made by management of the Company. Forward-looking statements made in this news release include statements regarding the proposed use of proceeds of the Credit Facility and the potential issuance of Shares in satisfaction of interest or the Commitment Fee. Although management of the Company believes that the expectations and assumptions on which such forward-looking statements and information are based are reasonable, undue reliance should not be placed on the forward‐looking statements and information since no assurance can be given that they will prove to be correct.

Forward-looking statements and information are provided for the purpose of providing information about the current expectations and plans of management of the Company relating to the future. Readers are cautioned that reliance on such statements and information may not be appropriate for other purposes, such as making investment decisions. Actual results could differ materially from those currently anticipated due to a number of factors and risks, including, with respect to the Credit Agreement, the timing of TSX Venture Exchange approval for any shares for debt issuances; and with respect to the use of proceeds, the sufficiency of the proceeds, the speculative nature of mineral exploration and development, fluctuating commodity prices, and competitive conditions, as described in more detail in our recent securities filings available at www.sedarplus.ca. Accordingly, readers should not place undue reliance on the forward‐looking statements and information contained in this news release. Readers are cautioned that the foregoing list of factors is not exhaustive. The forward‐looking statements and information contained in this news release are made as of the date hereof and no undertaking is given to update publicly or revise any forward‐looking statements or information, whether as a result of new information, future events or otherwise, unless so required by applicable securities laws. The forward-looking statements or information contained in this news release are expressly qualified by this cautionary statement.

Val-d’Or, QC – February 23rd, 2026 – Bonterra Resources Inc. (TSX-V: BTR, OTCQX: BONXF, FSE: 9BR2) (“Bonterra” or the “Company”) is pleased to announce updated Mineral Resource Estimates (the “2026 MREs”) for the Barry and Gladiator deposits (the “Properties”). The 2026 MREs were independently prepared by P&E Mining Consultants Inc. (“P&E”) on behalf of the Company in accordance with National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”) and are effective as of February 18, 2026.

Key Highlights:

• Barry and Gladiator combined 2026 MREs of 1.401 million ounces (“Moz”) of Measured & Indicated Mineral Resources at an average grade of 2.90 g/t Au contained within 15.025 million tonnes (“Mt”), and 2.033 Moz of Inferred Mineral Resources at an average grade of 4.32 g/t Au contained within 14.628 Mt.
• Combined contained gold ounces increased by 30% in Measured & Indicated Mineral Resources and by 21% in Inferred Mineral Resources relative to the 2021 Mineral Resource Estimates (the “2021 MREs”).
• Barry MREs (Open Pit): 0.417 Moz of Measured & Indicated Mineral Resources grading 1.67 g/t Au within 7.794 Mt, and 9 Koz of Inferred Mineral Resources grading 2.32 g/t Au within 125 Kt.
• Barry MREs (Underground): 0.457 Moz of Measured & Indicated Mineral Resources grading 3.47 g/t Au within 4.092 Mt, and 0.962 Moz of Inferred Mineral Resources grading 3.41 g/t Au within 8.789 Mt.
• Gladiator MREs (Underground): 0.527 Moz of Measured & Indicated Mineral Resources grading 5.23 g/t Au within 3.139 Mt, and 1.062 Moz of Inferred Mineral Resources grading 5.78 g/t Au within 5.714 Mt.

Marc-Andre Pelletier, President and CEO commented: “The updated 2026 MREs prepared by P&E, combined with additional drilling completed since 2021, has resulted in a significant increase in Mineral Resources across all classifications for the Properties. Overall, the quality of the 2026 MREs has improved, highlighted by a 30% increase in Measured & Indicated Mineral Resources, along with important technical enhancements, including a more conservative Mineral Resource classification methodology and an increase in the minimum mining width from
1.20 m to 1.75 m, more closely aligned with industry standards. Both deposits remain open at depth and along the eastern down-plunge, particularly at Barry, where two drill rigs are currently testing extensions of the mineralization. Most importantly, the Urban-Barry Camp continues to demonstrate its potential to host multiple multi-million-ounce gold deposits.”

2026 MREs Details & Assumptions

Data Analysis

• The 2026 MREs include new drilling performed by Bonterra from 2021 to 2023, including 86,985 m drilled containing 81,370 assays at Barry and 31,815 m drilled containing 26,811 assays at Gladiator.
• A total of 1,313 drill holes and 302,424 m drilled containing 193,463 assays are considered for the Barry deposit and 553 drill holes and 256,794 m drilled containing 150,263 assays for the Gladiator deposit.
• Revision of the capping threshold for particular mineralized zones based on geological and structural groupings.
• A more robust classification strategy based on field observations in historical pit, oriented drill core and robust variography.

Geology Interpretation and Modelling

• Extensive drilling conducted after 2021 extended mineralization both down dip and along strike for both Barry and Gladiator Deposits.
• Revised modelling interpretations resulting from oriented core drilling.
• Revised modelling interpretations and cut-off resulting from increased metal prices.
• Increased minimum mining width from 1.20 m to 1.75 m now more closely aligned with industry standards.
• All blocks within the 2026 underground MREs are constrained by stope shapes as recommended by the CIM Estimation of Mineral Resources and Mineral Reserves Best Practice Guidelines.

The table below shows the comparison between the 2021 and 2026 MREs:

Table 1: Barry and Gladiator Deposits – Comparison of Mineral Resources in 2021 MREs with 2026 MREs

Notes:

1. 2021 MREs are estimated using a cut-off grade of 1.0 g/t Au and 2.6 g/t Au for open pit and underground, respectively
2. 2021 underground MREs not constrained by stope shapes.
3. 2026 MREs are estimated using a cut-off grade of 0.3 g/t Au for open pit and a 2.0 g/t Au cut-off used to define underground stopes that constrain the blocks being reported.
4. 2021 MREs and 2026 MREs are estimated using long-term gold prices of US$1,600 per oz, and US$2,850 per oz, respectively.
5. Exchange rate 2021 was US$/C$ 0.75 and 0.72 for in 2026 MREs.
6. Numbers may not add due to rounding.

Barry Deposit MRE

The Barry Mineral Resources Estimate is based on over 73 veins grouped within 10 shallow to steeply dipping vein sets from surface to 650 m in depth, within which 1.0 m composites have been estimated in a multi-pass inverse distance cubed (“ID3”) interpolation approach (see Table 2). Vein orientations are confirmed through mapping of surface exposure in the Barry historical pits and observed vein angles in drill core. Measured Mineral Resources were defined where proximal to historical pits and defined using three drill holes spaced up to 15 m apart. Indicated Mineral Resources are limited to areas defined using three drill holes spaced up to 30 m apart. Inferred Mineral Resources represent areas with drill hole spacing up to 60 m. Open pit Mineral Resources are reported within an optimized pit at a gold cut-off grade of 0.3 g/t Au, and below, underground Mineral Resources are reported within underground reporting shapes constructed using a minimum thickness of 1.75 m and a gold cut-off grade of 2.0 g/t Au, and limited to areas of continuous mineralization. A buffer solid of 2 m was created around all mineralized wireframes to capture any marginal grade for underground stope optimization internal dilution. All blocks within the underground constraining optimized stope shapes have been included within the Mineral Resources Estimate at a zero cut-off grade.

Table 2: Barry Deposit 2026 MRE

Notes:

1. CIM definitions were followed for Mineral Resources.
2. Mineral Resources are presented externally undiluted and in situ and are considered to have reasonable prospects for eventual economic extraction. The Mineral Resources near surface are constrained by a pit optimization surface and the underground Mineral Resources are constrained by potentially mineable stope shapes.
3. Underground Mineral Resources stope shapes are optimized at a cut-off of 2.0 g/t Au. Open Pit Mineral Resources are estimated at a cut-off of 0.3 g/t Au.
4. Mineral Resources are estimated using a long-term gold price of US$2,850 per oz and a US$/C$ exchange rate of 0.72.
5. A minimum mining width of 1.75 m was used.
6. Assay samples were composited within the mineralization envelopes into 1.0 m length composites. A value of 0.001 g/t Au was applied in cases of drill core not assayed.
7. High grade outliers were established using a statistical analysis on a per-zone basis for gold on composite data. Capping varied from 3.0 g/t to 50 g/t Au and was applied on composites within each specific wireframe.
8. Bulk density values were applied on the different mineralized zones varied from 2.63 to 2.95 t/m³ based on site drill core measurements with a mean of 2.81 t/m³ used for reporting purposes.
9. ID3 grade interpolation was used.
10. Grade estimates are based on a parent block dimension of 2 m x 4 m x 4 m with sub-cells down to 0.25 m x 1 m x 1 m. Search parameters were determined by variography.
11. Numbers may not add due to rounding.

Figure 1: Barry 2026 MRE Longitudinal Projection View Looking North

Gladiator Deposit MRE

The Gladiator Mineral Resources Estimate is based on over 127 vein structures and clusters within 8 structural groups. Block model grade estimates are controlled by the geological/vein interpretations and were completed using a three-pass ID3 interpolation and capped 1.0 m composites (see Table 3). Measured Mineral Resources were defined using three drill holes spaced up to 15 m apart. Indicated Mineral Resources are limited to areas defined using three drill holes spaced up to 30 m apart. Inferred Mineral Resources represent areas with drill hole spacing and extrapolation up to 60 m. Mineral Resources are reported within underground reporting shapes constructed using a minimum thickness of 1.75 m and a cut-off grade of 2.0 g/t Au, limited to areas of continuous mineralization. A buffer solid of 2 m was created around all mineralized wireframes to capture any marginal grade for underground stope optimization internal dilution. All blocks within the underground constraining optimized stope shapes have been included within the Mineral Resources Estimate at a zero cut-off grade. A 50 m crown pillar below the base of overburden has been excluded from the Mineral Resources.

Table 3: Gladiator Deposit 2026 MRE

Notes:

1. CIM definitions were followed for Mineral Resources.
2. Mineral Resources are presented externally undiluted and in situ and are considered to have reasonable prospects for eventual economic extraction. The Underground Mineral Resources are constrained by potentially mineable stope shapes.
3. Underground Mineral Resources are estimated at a cut-off of 2.0 g/t Au.
4. Mineral Resources are estimated using a long-term gold price of US$2,850 per oz and a US$/C$ exchange rate of 0.72.
5. A minimum mining width of 1.75 m was used.
6. Assay Samples were composited within the mineralization envelopes into 1.0 m length composites. A value of 0.001 g/t Au was applied in cases of drill core not assayed.
7. High grade capping was done on composite data and established using a statistical analysis on a per-zone basis for gold. Capping varied from 10 g/t Au to 70 g/t Au and was applied on composites within each specific wireframe.
8. Bulk density values were applied on the different mineralized zones varied from 2.41 to 2.99 t/m³ based on-site drill core measurements with a mean of 2.78 t/m³ used for reporting purposes.
9. ID3 grade interpolation was used.
10. Grade estimates are based on a parent block dimension of 2 m x 4 m x 4 m with sub-cells down to 0.25 m x 1 m x 1 m. Search parameters were determined by variography.
11. A 50 m crown pillar was applied at Gladiator.
12. Numbers may not add due to rounding.

Figure 2: Gladiator 2026 MRE Longitudinal Projection View Looking North

Summary and Validation

Mineralized domains were initially developed by Bonterra and were reviewed, modified and accepted by P&E. All Mineral Resources domains were defined within Leapfrog Geo^TM software and sub-block model estimates were completed within Leapfrog Edge^TM. Underground constraining shapes at Barry and Gladiator were optimized using Deswik^TM stope optimizer software. The limit of the Barry open pit Mineral Resources shell was optimized using NPV Scheduler^TM software and was determined with consideration to underground mining costs. In addition to standard database validation techniques, wireframe and block model validation procedures, including wireframe to block volume confirmation, statistical comparisons with composite and nearest neighbour estimates, swath plots, visual reviews in 3D, longitudinal, cross-section, and plan views, and cross software reporting confirmation, were completed for all deposits.

The Qualified Person (“QP‘”) considers the geological modelling, grade estimation, and Mineral Resources classification considered in these Mineral Resources estimates to be consistent with industry practice and aligned with the CIM Estimation of Mineral Resources and Mineral Reserves Best Practices guidelines, as recommended by Canadian Securities Administrators’ National Instrument 43‑101. Mineral Resources are not Mineral Reserves and do not have demonstrated economic viability.

Further details regarding the 2026 MREs, key assumptions, parameters and methods used to estimate the Mineral Resources of the Barry and Gladiator Deposits will be available on SEDAR+ (www.sedarplus.ca ) under the Corporation’s issuer profile within 45 days of this news release in accordance with NI 43-101.

Phoenix JV

Under the JV Agreement, Gold Fields has the right to acquire a 70% interest in the Project by spending C$30 million in work expenditures, with a minimum spending commitment of C$10 million per year over a three-year period (see press release dated November 28, 2023).

This news release, including the Mineral Resources Estimates disclosed herein, has been prepared solely by the Company and is based on information available to the Company as of the date hereof. Neither Gold Fields Limited nor its affiliate Windfall Mining Group Inc. has verified, approved, or endorsed the Mineral Resources Estimates or the content of this news release, and no representation or warranty is made by Gold Fields Limited or Windfall Mining Group Inc. with respect thereto. References to the Phoenix Joint Venture are provided for contextual purposes only and should not be construed as statements made by, or on behalf of, Gold Fields Limited or Windfall Mining Group Inc.

Independent Qualified Persons

The Mineral Resources Estimate was prepared by P&E. The QP has reviewed and approved the content of this news release. Independent QP Antoine Yassa, P. Geo, OGQ of P&E has prepared and supervised the preparation of the technical information relating to this Mineral Resources Estimate.

Bonterra Qualified Person and QA/Qc

M. Donald Trudel, P. Geo. (OGQ # 813), Director Geology for the Company, has reviewed and approved the technical information contained in this press release. Mr. Trudel is a Qualified Person as defined by National Instrument 43-101 on standards of disclosure for mineral projects.

The Barry and Gladiator project’s drill core gold analyses are performed at Bachelor Mine Laboratory, Actlabs
(Ste-Germaine-Boulé) and at AGAT Laboratories located in Val d’Or, Québec. The Company’s laboratory and external laboratories employ a rigorous QAQC analysis program that meets industry standards.  The analyses are carried out by fire assay (A.A.) with atomic absorption finish at Bachelor Mine Laboratory and with gravimetric finish for assay above 10 g/t Au at Actlabs and AGAT laboratories.  Blanks, duplicates, and certified reference materials are inserted into the sample stream to monitor the Laboratory’s performance.  The Company’s QAQC program requires that at least 5% of samples be analyzed by an independent laboratory.  These verification samples are sent to ALS Minerals laboratory facility located in Val-d’Or, Québec.  The verifications show a high degree of correlation with the Laboratory’s results.

ABOUT P&E MINING CONSULTANTS INC.

P&E, established in 2004, provides geological and mine engineering consulting reports, Mineral Resources Estimate technical reports, Preliminary Economic Assessments and Pre-Feasibility Studies. In addition, we are affiliated with major consulting firms for the purposes of joint venturing on Feasibility Studies. Our experience covers over 480 technical reports on diamonds, most metallic deposits including gold, silver, base metals, PGM and iron for both open pit and underground deposits. Software packages utilized include Gemcom, Leapfrog, Whittle, NPV Scheduler, Vulcan, Ventsim, AutoCAD and Deswik. P&E’s 22 associates have experience in geological interpretation, 3D geological modelling, technical report writing, Mineral Resources and Mineral Reserves Estimates, property evaluations, mine design, production scheduling, operating and capital cost estimates, and metallurgical engineering.

ABOUT BONTERRA

Bonterra is a Canadian gold exploration Company with a portfolio of advanced exploration assets anchored by a central milling facility in Québec, Canada. The Company’s assets include the Gladiator, Barry, Moroy, and Bachelor gold deposits. The Barry and Gladiator deposits which collectively hold 1.401 million ounces (“Moz”) of Measured & Indicated Mineral Resources at an average grade of 2.90 g/t Au contained within 15.025 million tonnes (“Mt”), plus 2.033 Moz of Inferred Mineral Resources at an average grade of 4.32 g/t Au contained within 14.628 Mt.

In November 2023, the Company entered into an earn-in and joint venture agreement with Osisko Mining Inc. (“Osisko Mining”) for the Urban-Barry properties (the “JV Agreement”), which include the Gladiator and Barry Deposits. In October 2024, Gold Fields Ltd, through a wholly owned Canadian subsidiary, completed the acquisition of Osisko Mining for C$2.16 billion. Gold Fields is now the counterparty to the JV Agreement and can continue to earn a 70% interest in the joint venture by incurring C$30 million in work expenditures on or before November 2026 (including expenditures incurred by Osisko Mining prior to October 2024). This strategic transaction highlights Bonterra’s dedication to advancing its exploration assets, marking a significant step towards development.

FOR ADDITIONAL INFORMATION

Marc-André Pelletier, President & CEO
ir@btrgold.com

2872 Sullivan Road, Suite 2, Val d’Or, Québec J9P 0B9

819-825-8678 | Website: www.btrgold.com

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Caution regarding forward-looking statements

This news release contains forward-looking statements within the meaning of applicable securities laws. All statements other than statements of historical fact may be forward-looking and are often identified by words such as “may”, “will”, “plan”, “expect”, “anticipate”, “estimate”, and “intend”. Forward-looking statements in this release include, without limitation, planned drilling activities, deep-drilling objectives at the Barry deposit, and Gold Fields’ ability to complete the remaining earn-in expenditures under the JV Agreement.

These statements are based on assumptions considered reasonable by management, including assumptions regarding exploration plans, budgets, schedules, regulatory approvals, and the continued advancement of work by Gold Fields. However, forward-looking statements involve known and unknown risks, uncertainties, and other factors that may cause actual results to differ materially. Such risks include, but are not limited to, changes to exploration plans, results that differ from expectations, operational or permitting challenges, the ability of the parties to complete the Joint Venture, the timing and completion of earn-in expenditures, the speculative nature of mineral exploration, commodity price fluctuations, and the availability of financing. Additional information regarding risks can be found in the Company’s filings at www.sedarplus.ca.

Readers are cautioned not to place undue reliance on forward-looking statements. The Company does not undertake to update any forward-looking statement except as required by applicable securities laws. All forward-looking statements in this release are expressly qualified by this cautionary statement.