Mr. Marc-Andre Pelletier reports

BONTERRA ANNOUNCES 2025 EXPLORATION PLANS AT ITS 100% OWNED DESMARAISVILLE SOUTH PROJECT

Bonterra Resources Inc. has provided an update on its 2025 exploration plans at its 100-per-cent-owned Desmaraisville South project. During the first half of the year, Bonterra's geology team has diligently worked on a comprehensive reinterpretation of the geological setting surrounding the Bachelor mill complex. Leveraging the advanced capabilities of Vrify's artificial-intelligence-assisted mineral discovery platform known as Dora, the team has identified several high-potential drill targets. As a result, Bonterra is planning a 10,000-to-12,000-metre drill program expected to be completed by year-end.

Marc-Andre Pelletier, president and chief executive officer, commented: "At our 100-per-cent-owned Desmaraisville South project, Bonterra's exploration strategy is focused on discovering new mineralized zones near the Bachelor mill complex. The 2025 exploration program builds on the success of the 2024 drilling campaign, which identified several high-priority targets. We also plan to test additional promising targets selected with the assistance of Vrify's Dora. With the recent completion of our upsized financing, Bonterra is fully funded to execute on this year's exploration plans."

2025 exploration plans:

• Drill 10,000 to 12,000 metres near the Bachelor mill complex, including the Mistik 13, Hewfran and other targets, including a predominantly base metals target and Vrify's AI-generated targets;
• Carry out fieldwork, focusing on mapping, soil and rock geochemical sampling;
• Reinterpret the 2023 gravimetric geophysical surveys.

Bachelor mill complex

Bonterra owns 100 per cent of the Bachelor mill complex, a strategically important asset for future mining operations within the Desmaraisville camp. The fully operational mill has a current capacity of 800 tonnes per day and is powered by low-cost and sustainable hydroelectric grid power. Permitting is under way to support a potential expansion to 1,800 tonnes per day. The complex also includes a fully equipped assay laboratory (capable of processing approximately 6,000 samples per month) as well as a 100-person camp, offices, workshops and core logging facilities.

Qualified person

Donald Trudel, PGeo (OGQ No. 813), director of 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, Standards of Disclosure for Mineral Projects.

About Bonterra Resources Inc.

Bonterra Resources is a Canadian gold exploration company with a portfolio of advanced exploration assets anchored by a central milling facility in Que., Canada. The company's assets include the Gladiator, Barry, Moroy and Bachelor gold deposits, which collectively hold 1.24 million ounces in measured and indicated categories and 1.78 million ounces in the inferred category.

In November, 2023, the company entered into an earn-in and joint venture agreement with Osisko Mining Inc. for the Urban-Barry properties, 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 $2.16-billion. Gold Fields is now the counterparty to the joint venture agreement and can continue to earn a 70-per-cent interest in the joint venture by incurring $30-million in work expenditures until 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 toward development.

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