Radisson Mining Resources has discovered a high-grade occurrence of coarse visible gold in a newly excavated surface trench at its 100%-owned O’Brien Gold Project in Québec’s Abitibi region—just 30 metres from its core shack and office complex.

The trench, which is the initial one among several intended for the company’s summer exploration efforts, is situated close to the anticipated surface continuation of the “Jewellery Box” zone, an area known for its historical high-grade quality within the previous O’Brien Gold Mine.

“Coarse visible gold in drill core is not unusual at the O’Brien project, but this trench, opened under light overburden near our existing infrastructure, returned a world-class example of under-foot mineralisation,” said Matt Manson, President and CEO of Radisson. “It underscores the strong discovery potential that remains, even in the shadow of our own offices.”

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Excavated to expose Piché Group rocks in the hanging wall of the Cadillac-Larder Lake Break, the trench revealed impressive quartz-sulphide-gold vein structures. The location lies outside the current mineral resource and the Preliminary Economic Assessment (PEA) published on July 9, 2025.

The discovery follows a standout December 2024 intercept from the same zone, where Radisson reported 643.1 g/t gold over 2.1 metres, including 1,345.0 g/t over 1.0 metre, at approximately 200 metres vertical depth—interpreted to represent a rediscovery of the historic Jewellery Box stope.

“This trench confirms an extremely rich gold environment both at depth and at surface,” added Manson. “The area has now been secured, and additional trenching is planned to further evaluate this exciting zone.”