Sierra Madre Announces Guitarra Processing Plant Achieves Throughputs of up to 720 Tonnes per Day as Development at Nazareno and Guitarra Mines Accelerates

Sierra Madre's Guitarra processing plant has reached steady throughput of up to 720 tonnes per day, a more than 40% increase over the prior 500 tpd nameplate following Phase 1 crushing and milling modifications. The new 11x12 ball mill is installed with commissioning expected in November 2026, and management says the Phase 2 target of 1,200-1,500 tpd is tracking more than eight months ahead of schedule. Underground development has accelerated at the Guitarra, Nazareno and Coloso mines, with groundwork started on the permitted dry stack tailings expansion supporting the Phase 2 plan.

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