VANCOUVER, BRITISH COLUMBIA — January 20, 2026 — Leads & Copy —
Pinnacle Silver and Gold Corp. has confirmed the presence of strong gold-silver mineralization at the El Potrero project in Durango, Mexico. Surface and underground sampling of the Estrella Vein showed positive results.
The limited mine workings are 42.5 meters long, and channel sampling identified two mineralized zones yielding 5.49 g/t Au and 48 g/t Ag over an average width of 0.72 meters and strike length of 12 meters, and 1.87 g/t Au and 51 g/t Ag over an average width of 1.1 meters and a strike length of 22.5 meters. The two zones are separated by 18 meters of lower grade material in the adit but could coalesce below this. Individual samples assayed up to 17.7 g/t Au and 24 g/t Ag over 0.5 metres, 8.77 g/t Au and 32 g/t Ag over 0.5 metres, and 3.51 g/t Au and 196 g/t Ag over 0.8 metres.
On surface, the vein has been traced for almost 150 meters along strike and is still open in both directions, reaching a width of 6.0 meters at the northern end of the exposure. Systematic channel sampling will be conducted in the coming weeks as, to date, grades from surface sampling reached 3.35 g/t Au and 204 g/t Ag.
Following up on the underground channel sampling at the historic La Dura 2 mine workings that returned 1.98 g/t Au and 98 g/t Ag along a 12-metre strike length (see Pinnacle News Release of November 12, 2025), surface sampling of the vein has extended the gold-silver mineralization along strike such that the zone can now be followed for approximately 45 meters. Within the seven vein samples taken on surface, assays included 6.89 g/t Au and 208 g/t Ag over 1.4 meters, 5.95 g/t Au and 185 g/t Ag over 1.0 meters, 5.75 g/t Au and 230 g/t Ag over 0.7 meters, and 3.39 g/t Au and 248 g/t Ag over 1.3 meters. This additional information will aid in delineation drilling of La Dura once the surface program begins.
According to Robert Archer, Pinnacle’s President & CEO, the identification of high grades of gold and silver mineralization in the Estrella vein is a key development for the Potrero Project. Archer added that the vein is approximately 500 meters southwest of the main Dos de Mayo structure that hosts the three principal mines on the property, and it significantly opens up the size of the mineralized system, both laterally and vertically.
Archer also noted that at surface, La Estrella sits at an elevation of 1,880 masl (metres above sea level) whereas Dos de Mayo is predominantly exposed between 1490 and 1570 masl, suggesting that there could be up to 400 metres of vertical continuity of the epithermal system preserved below La Estrella. The vein exhibits brecciated, lattice bladed and banded textures, and contains substantial amounts of clay minerals such as kaolin, with red, orange, and lemon-yellow oxides, all features that typically occur in the upper parts of a low-sulphidation epithermal system. La Estrella is developing into an important drill target once permits are in place.
The identification of significantly higher-grade gold-silver mineralization in outcrop at La Dura 2 has more than tripled the known strike length of this mineralized zone. Given the limited extent and orientation of the underground workings here, this zone will be drilled from surface as soon as possible.
The general strike of the Estrella vein is north-south with an inclination of 70° to 80° to the east, but in the north it bends to a northeast strike towards the Capulin and Dos de Mayo veins. Projecting the Estrella vein along strike to the north would intersect the Dos de Mayo structure just northwest of La Dura and extend the Estrella structure for some 600-800 metres. The intersection of two structural trends is often the locus of significant mineralization in these types of vein systems.
Sixty-two underground channel samples were taken in 16 composites, at approximately three-metre spacing, over the 42.5 metre length of the historic Estrella mine workings. Gold assays ranged from 0.02 to 17.7 g/t with 22 samples (35%) assaying more than 1.0 g/t Au. Silver assays ranged from 2 to 196 g/t with 17 samples (27%) assaying more than 31 g/t (one troy ounce per ton) Ag. On surface, 9 samples were taken over the 150-metre strike length of the Estrella vein exposure. Gold assays ranged from 0.008 to 3.35 g/t and silver assays ranged from 2 to 204 g/t.
Mr. Jorge Ortega, P. Geo, a Qualified Person as defined by National Instrument 43-101, has reviewed, verified and approved for disclosure the technical information contained in this news release.
El Potrero is located within 35 kilometres of four operating mines, including the 4,000 tonnes per day (tpd) Ciénega Mine (Fresnillo), the 1,000 tpd Tahuehueto Mine (Luca Mining) and the 250 tpd Topia Mine (Guanajuato Silver).
Robert A. Archer, President & CEO
For further information contact: Email: info@pinnaclesilverandgold.com, Tel.: +1 (877) 271-5886 ext. 110
Source: Pinnacle Silver and Gold Corp.
