Bonterra Resources Inc. announced more results from the now completed infill drilling campaign at the Barry underground project, which holds 0.5 million ounces of Measured and Indicated Mineral resources and 0.7 million ounces of Inferred Mineral resources according to the last mineral resources estimate. The primary goal of this campaign was to convert mineral resources to a higher confidence category and enhance the interpretation and grade continuity of the mineralization in the upper section of the deposit. In total, 31,349 meters ("m") (91 holes) of infill drilling has been completed from surface since August 2022.

The Company has received assays for 75 holes so far, including the ones in this. In March, the Company announced a 3,300 m drill program at the Duke property ("Duke"), a joint venture with Osisko Mining Inc. ("Osisko"). As of now, six of ten holes have been drilled, and the drilling activities are tracking on schedule (see press release dated March 6, 2023).

The drill results are expected to be released upon completion of the program. The drill program at Duke is part of the Company's renewed focus on regional exploration at a rate of approximately 1,400 m per month in the Urban-Barry and Bachelor camps. The completed infill drill program of the Barry underground project was designed to convert the Inferred resources from the 2021 MRE into Indicated resources by decreasing the drill spacing to 25 m. The program especially aims to delineate and expand high-grade mineralized shoots identified in the 2021 MRE.

Results from recent assays, including those in this press release, underscore the potential of increasing quantity and continuity of the underground mineralization. Infill drilling in the 800 zone continue to delineate and increase the length and continuity of the high-grade shoots. Results like 34.7 g/t Au over 2.4m including 72.0 g/t Au over 1.1 m in hole MB-22-560A, 16.3 g/t Au over 2.8 m including 26.6 g/t Au over 1.7 m in hole MB-22-585 and 17.7 g/t Au over 3.2 m including 30.1 g/t Au over 1.8 m in hole MB-23-594 enhance the potential of high grade continuous mineralized shoots in the 800 zone.

Assays from 17 holes drilled in the zone 800 during winter are pending. Infill Drilling into the H6/D4 moderate south dipping self-intersecting zones helped to better constrain the high-grade mineralization highlighted by the 2021 MRE. Infill drilling continues to highlight the continuity of high-grade shoots through the mineralized shears.

Results as 9.0 g/t Au over 9.2 m including 21.7 g/t Au over 2.0 m in hole MB-22-578, 5.6 g/t Au over 6.3 m including 10.7 g/t Au over 2.0 m in hole MB-22-575 and 4.6 g/t Au over 7.7 m including 9.2 g/t Au over 2.5 m and 11.5 g/t Au over 0.7 m in hole MB-22-554 enhance the 300 m long continuity of large high grade shoots in zone H6. Infill drilling in poorly defined H18 zone following the high-grade shoots has successfully intercepted high mineralization were predicted. Drill results highlight the potential for a 300 m long mineralized shoot in the shear zone located 20 m beneath the H6 shear.

Demonstration is made by results in hole MB-22-565A with 6.4 g/t Au over 4.0 m including 13.2 g/t Au over 1.2 m, hole MB-22-564 returning 3.0 g/t Au over 10.4 m including 13.4 g/t Au over 1.1 m hole MB-22- 575 intercepting 4.7 g/t Au over 8.1 g/t Au including 11.6 g/t Au over 1.5 m and hole MB-22-578 with 10.7 g/t Au over 1.5 m. The Barry gold 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 from 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 kilometre along strike and 700 m below surface and remains open for expansion.