Bonterra Resources Inc. announced more results from the now completed infill and expansion 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, primarily in the upper section of the deposit. In total, 31,349 metres ("m") (91 holes) of infill drilling has been completed from surface since August 2022.

The Company has received assays for 89 holes so far, including the holes disclosed in this release. To date, 1,619 samples are pending results. Operational Updates: In addition to the cost saving initiatives announced in November 2022 and March 2023.

the Company implemented a new working schedule at the Barry site in April 2023 and expects to reduce fixed camp costs by 50% or approximately $0.5 million ("M") in 2023. Also, the Company received proceeds of $0.4 million in First Quarter 2023 from the rental of the Bachelor camp during the construction of the proposed Kuikuhaacheu hydroelectric power transmission line from the Waswanipi substation to the Windfall gold project, which is approximately 15 kilometers ("km") from Bonterra's Barry and Gladiator deposits. More revenue is expected for the rest of the year.

Finally, the Company is currently undertaking the cleaning of the Bachelor Mill to recover the gold trapped in the circuit from past production activity. This work is expected to take place in the ensuing months and the revenue generated is expected to support the Company's exploration activities. Exploration Updates: The Company has allocated one drill rig to its Barry North-East regional exploration program, which consists of eleven drill holes covering 3,200 m. This program targets induced polarization anomalies along the Mazeres fault corridor, located three km to the northeast of the Barry deposit.

So far, four drill holes covering 1,654 m have been completed. The Company also commenced a 3,500 m exploration and follow-up drill program at the Panache South target area. The program is currently testing targets North of historical showing of 12.9 g/t Au over 0.5 m and 3.2 g/t Au over 0.4 m as well as showings from the 2021 drill campaign where significant gold mineralization was intersected such as 5.5 g/t Au over 1.5 m, including 16.2 g/t Au over 0.5 m, 23.1 g/t Au over 2.3 m, including 62.3 g/t Au over 0.8 m, and 30.6 g/t Au over 1.5 m, including 91.4 g/t Au over 0.5 m from shear-hosted quartz carbonate vein systems. So far, two drill holes totalling 909 m have been completed.

The infill drill program at 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 and to expand the mineralization in the sub-vertical 800 Zone at depth. The results presented in this release keep on defining the high grade ore shoots between 100 and 200 m below the surface and better delineate the mineralization in the lesser drilled portion of the 800 Zone around 250 m below the surface. The latest infill drilling results from the 800 Zone demonstrate the continuity of the mineralization.

Hole MB-23-593A returned results of 8.2 g/t Au over 8.2 m including 54.5 g/t Au over 0.5 m, hole MB 23-599 returned 5.0 g/t Au over 7.2 m including 16.2 g/t Au over 0.6 m, as well as hole MB 23-601A returned 7.2 g/t Au over 3.7m including 30 g/t Au over 0.5m and finally the MB 23-611 returned 6.4 g/t Au over 2.9 m including 16.2 g/t Au over 2.0 m. All the results confirm the plunge of the gold trend, its extension at depth and the potential to increase the mineral resources for the 800 Zone. The Barry North-East and the Panache South properties are located on the west portion of the Urban- Barry camp, in the Macho mafic volcanic formation, where the Barry deposit and Moss showings occur along the Mazeres fault system striking N60 toward the Osisko Mining's Windfall deposit. The Panache showing located in the northeast portion of the area occurs along the Milner fault which also hosts the Fox and Fox West Zones owned by Osisko Mining.

Barry Deposit Geology: 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 sulphides within shear zones and veins with local visible gold. The Barry deposit has been delineated over 1.4 km along strike and 700 m below surface and remains open for expansion.