
Sierra Madre Gold & Silver, SM.v and SMDRF, Lines Up 30,000m of Drilling in Mexico's Last Unexplored Spanish Colonial Silver Camp, Right Beside Its Producing La Guitarra Mill
Posted on behalf of Sierra Madre Gold - Most of the attention on this company lately has gone to the Del Toro acquisition, but the quieter story sits right beside its producing La Guitarra mill in Estado de Mexico (SM.v, and SMDRF for US investors).
The East District of the Guitarra complex covers the historic Temascaltepec mining area, and per the company's October 23, 2025 news release it is the last of the six major Spanish Colonial production centres in Mexico that has never been systematically mapped, drilled, and evaluated with modern tools. That is now changing.
The Groundwork
- A US$3.5M exploration program has been underway since October 2025, focused on drill target definition: surface mapping, surveying, sampling of historic workings, and structural analysis (Oct 23, 2025 NR) .
- Over 39 km of structures mapped to date, plus numerous historic mines across the district .
- Federal land-use authorization secured at Tlacotal, reclassifying 34.7 ha from agriculture and forestry to mining use, with land purchase agreements executed over an adjacent 33.1 ha (Jan 27, 2026 NR) .
- Tlacotal is positioned as a staging area for East District exploration and sits near the Santa Ana vein deposit which already hosts silver-gold resources per the 2023 NI 43-101 report. Resources, to be clear, not reserves.
The Drill Program
- A 30,000 m East District drill program is planned to start in H2 2026 (per the April 29, 2026 year-end NR) . That window has just opened.
- This is separate from the roughly 30,000 m program planned at the newly acquired Del Toro project in Zacatecas.
- The company has said it anticipates funding the East District program from treasury and cash flow (Oct 23, 2025 NR) .
Why It Matters
Any discovery here is a short haul from a mill that has been in commercial production since January 2025 and is being expanded in two stages, Phase 1 targeting 750-800 tpd and Phase 2 targeting 1,200-1,500 tpd by Q3 2027. Drilling next to owned, operating infrastructure means results have a clear path toward mill feed rather than sitting in a resource table.
With targets defined, ground secured, and drills slated to turn this half, the East District gives a producing company a genuine discovery angle on its own doorstep, and room for the story to grow beyond the two mines the market is already watching. For the background, see the company's October 23, 2025 and January 27, 2026 news releases.