Pinnacle Silver and Gold Corp. Announces Sampling Results from La Dura Mine
VANCOUVER, BRITISH COLUMBIA — November 12, 2025 — Leads & Copy — Pinnacle Silver and Gold Corp. has released sampling results from the historic La Dura mine at the El Potrero gold-silver project in Durango, Mexico.
According to Pinnacle, the identification of another zone of gold-silver extends the mineralized strike length along the Dos de Mayo vein structure to almost 500 meters. The company plans to drill test the significant gaps between the three principal mines, potentially increasing the project’s overall potential. The Dos de Mayo vein has never been previously drilled.
The La Dura mine features a main adit that follows the vein for approximately 60 meters along strike to the northwest of the portal, as well as two smaller adits about 10 meters above and to the southeast of the main adit. These smaller adits, collectively called La Dura 2, show consistent mineralization.
Underground development at La Dura is less extensive compared to the Pinos Cuates or Dos de Mayo mines. Channel sampling at La Dura comprises only 146 of the 722 samples taken underground to date on the project. Of those 146 samples, 40 were taken from the two small adits. Six composite channels sampled the mineralized zone along an exposed 12-meter strike length, with an average width of 1.3 meters and average grades of 1.98 g/t Au and 98 g/t Ag. Individual grades reached up to 4.51 g/t Au and 269 g/t Ag over 0.5 meters. Very fine visible gold was observed in places.
The company believes that given the limited 12 meters of exposed mineralized zone, significant potential exists to expand this with additional mine development and drilling.
Robert Archer, Pinnacle’s President & CEO, stated that the discovery of this third zone of gold-silver mineralization along the Dos de Mayo vein is further evidence of the repeatability of these zones along strike. He added that the main La Dura adit appeared to have been developed in the wrong direction at that particular elevation, as it returned only anomalous grades. The mineralization exposed at La Dura 2 was likely discovered later, given its limited development.
Archer noted that while there is some grade variability within the system, the preliminary grades at La Dura 2 are comparable to other low-sulphidation epithermal systems in Mexico and underscore the high-grade nature of the gold-silver mineralization defined to date on the project.
According to Pinnacle, there is approximately 150 meters between La Dura and the Pinos Cuates mine, where Pinnacle sampling returned up to 85 g/t Au and 520 g/t Ag over 0.5 meters. The company intends to drill test this area for additional mineralized zones.
Additionally, approximately 120 meters of untested strike potential remains between Pinos Cuates and the Dos de Mayo mine to the southwest, plus more than 1,000 meters to the northwest of La Dura. The company is preparing all of these areas for drill-testing once surface permits are in place.
Currently, surface and underground mapping and sampling are focused on the La Estrella vein, a north-south trending structure approximately 500 meters to the southwest of the Dos de Mayo trend and at least 100 meters along strike. The company is working to understand the relationship between this north-south trend and the northwest-southeast Dos de Mayo trend, as the intersection of two structural trends is often the locus of significant mineralization in these types of vein systems.
The technical results contained in this news release have been reported in accordance with National Instrument 43-101 Standards of Disclosure for Mineral Projects. Pinnacle has implemented industry-standard practices for sample preparation, security, and analysis, including common industry QA/QC procedures to monitor the quality of the assay database.
Samples were bagged in pre-numbered plastic bags, each with a numbered tag inside, tied off with adhesive tape, and then bulk bagged in rice bags in batches not to exceed 40 kg. They were then numbered, and batch bags were tied off with plastic ties and delivered directly to the SGS laboratory facility in Durango, Mexico, for preparation and analysis. The lab is accredited to ISO/IEC 17025:2017. All Samples were delivered in person by the contract geologist who conducted the sampling under the supervision of the QP.
Mr. Jorge Ortega, P. Geo, a Qualified Person as defined by National Instrument 43-101, and the author of the NI 43-101 Technical Report for the Potrero Project, has reviewed, verified and approved for disclosure the technical information contained in this news release.
El Potrero is located in the Sierra Madre Occidental of western Mexico and lies within 35 kilometers of four operating mines. High-grade gold-silver mineralization occurs in a low sulphidation epithermal breccia vein system hosted within andesites of the Lower Volcanic Series and has three historic mines along a 500 metre strike length. The property has been in private hands for almost 40 years and has never been systematically explored by modern methods, leaving significant exploration potential.
Pinnacle will earn an initial 50% interest immediately upon commencing production. The goal would then be to generate sufficient cash flow with which to further develop the project and increase the Company’s ownership to 100% subject to a 2% NSR. If successful, this approach would be less dilutive for shareholders than relying on the equity markets to finance the growth of the Company.
Pinnacle Silver and Gold is focused on the development of precious metals projects in the Americas. The high-grade Potrero gold-silver project in Mexico’s Sierra Madre Belt hosts an underexplored low-sulphidation epithermal vein system and provides the potential for near-term production. The Company also owns a 100%interest in the past-producing, high-grade Argosy Gold Mine and the adjacent North Birch Project with an eight-kilometre-long target horizon in the prolific Red Lake District of northwestern Ontario.
For further information contact:
Email: info@pinnaclesilverandgold.com
Tel.: +1 (877) 271-5886 ext. 110
Source: Pinnacle Silver and Gold Corp.
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