Selkirk Copper reports Phase 2 drill results; advances feasibility study

Highlights The planned 50,000 metre Phase 2 drill program is advancing rapidly and ahead of schedule, with 27,300 metres completed during the first two months of drilling. Initial assay results from exploration drilling demonstrate continued potential for expansion of high-grade mineralized zones: At Minto East, a 50-metre step-out intersected 2.33% Cu, 1.98 g/t Au, and 22.3 g/t Ag (4.28% CuEq) over 4.3 m, in 26SCM178. At Minto North, a 30-metre step-out intersected 2.22% Cu, 0.41 g/t Au, and 5.3 g/t Ag (2.59% CuEq) over 4.5 m, in 26SCM183, within a broader interval of 1.44% CuEq over 11.9 m.

Initial results from infill drilling confirm continuity and increase confidence in priority resource areas: At 117 Lens, 1.02% Cu, 0.35 g/t Au, and 4.2 g/t Ag (1.35% CuEq) over 22.7 m , from 316.9 m in 26SCM175. Technical field data collection has commenced in support of an upcoming planned feasibility study, including geotechnical drilling, geotechnical test pitting, geometallurgical testwork, and structural geological mapping. The 2026 Mineral Resource Estimate and Preliminary Economic Assessment is being finalized and on track for completion in July.

Vancouver, British Columbia and Pelly Crossing, Yukon--(Newsfile Corp. - July 8, 2026) - Selkirk Copper Mines Inc.   (TSXV: SCMI)   (FSE: IO20) (OTCQB: SKRKF) (" Selkirk Copper " or the " Company ") is pleased to announce initial results from the Phase 2 drill program which commenced in May 2026, at the Minto Project in Yukon, Canada. M. Colin Joudrie, President & CEO, commented: "I continue to be impressed with the Selkirk Copper team's ability to progress a wide range of technical- and commercially-focused work programs in support of the planned feasibility study which is expected to commence in Q3 2026. The data being collected in the Phase 2 50,000 meter drill pr