Pinnacle Silver and Gold Corp. Announces Further Discoveries of Polymetallic Mineralization at Potrero Project

VANCOUVER, BRITISH COLUMBIA — April 20, 2026 — Leads & Copy — Pinnacle Silver and Gold Corp. has announced continued ground follow up on shafts, adits and prospecting pits interpreted from the recent airborne LiDAR survey on the Potrero project in Durango, Mexico has resulted in further discoveries of polymetallic mineralization.

Prospecting on the northern El Potrero claim block has resulted in the discovery of silver-rich veins, with assays up to 1,159 g/t Ag, while on the Maria Fernanda 2 (“MF2”) concession, continued field work has extended the previously announced silver-lead-zinc (Ag-Pb-Zn) mineralization along strike.

On the northern El Potrero claim group, a new series of adits on northeast-trending vein structures, dubbed the “Minas Nuevas”, returned assays up to 0.252 g/t Au, 1,159 g/t Ag, 4.72% Pb and 0.10% Zn over 0.35m. On the MF2 block, the ”Paulina Breccia” zone has been traced for approximately 400 metres to the northeast with 0.217 g/t Au, 47 g/t Ag, 0.65% Pb and 0.71% Zn over 0.40 m and 0.232 g/t Au, 50 g/t Ag, 0.48% Pb and 0.77% Zn over 0.60 m.

Also on the MF2 block and approximately 650 metres along strike to the southwest from the Paulina Breccia, an artisanal mine called “Las Guasimas” has yielded assays up to 3.21 g/t Au, 349 g/t Ag, 3.49% Pb and 5.30% Zn from dump grabs. Collectively, the Paulina Breccia and Guasimas mine extend the apparent strike length of the vein system on MF2 to approximately 1,100 metres.

According to Robert Archer, Pinnacle’s President & CEO, the discoveries validate the effectiveness of the LiDAR survey and demonstrate the district scale potential of the mineralizing system at El Potrero. From the processing plant at the northeast point of the project to the new Guasimas zone in the southwest is approximately 10 kilometres, and the company now has both Au-Ag and Au-Ag-Pb-Zn mineralizing systems present.

The polymetallic mineralization contrasts with the purely gold and silver NW-SE trending mineralization on the northern Dos de Mayo vein system and probably represents a different age of hydrothermal activity. The Au-Ag-Pb-Zn veins at the Topia Mine are just 4 kilometres away from MF2.

The LiDAR survey was flown over the entire 1,074 hectare property and confirmed known structural trends, outlined previously unknown structures, and identified a total of 6 shafts, 64 adits and 51 prospecting pits on the two claim blocks comprising the project.

Continued follow up field work has now revealed a larger system with multiple polymetallic veins on both claim blocks. On the northern El Potrero block, where the historic gold-silver mines and plant are located, a series of adits have been discovered on structures trending 030-040° and dipping 75-80° SE. Located in the south-central part of the block, approximately 3.5 kilometres south-southwest of the plant, these artisanal mine workings, named “Minas Nuevas”, host several structures with disseminated to semi-massive pyrite, galena, sphalerite, arsenopyrite and quartz veinlets.

The high sulphide content, comparative lack of quartz and elevation of 1,350 metres above sea level (“masl”) compared to 2,200 masl at MF2, suggest that they may represent a lower level of the hydrothermal system. Preliminary sampling also indicates that the veins here are Ag-Pb dominant, with assays up to 1,159 g/t Ag and 4.72% over 0.35 metres.

On the MF2 concession to the southwest, the “Paulina Breccia” zone with pyrite-sphalerite-galena mineralization has been extended approximately 400 metres along strike to the northeast from the initial discovery. Highlighted by 0.217 g/t Au, 47 g/t Ag, 0.65% Pb and 0.71% Zn over 0.40 m and 0.232 g/t Au, 50 g/t Ag, 0.48% Pb and 0.77% Zn over 0.60 m in the first-pass sampling, this tenor of mineralization was fairly consistent along strike.

Also on the MF2 block, an artisanal mine, called “Las Guasimas”, has yielded assays up to 3.21 g/t Au, 349 g/t Ag, 3.49% Pb and 5.30% Zn in grab samples from mine dumps and 0.02 g/t Au, 117 g/t Ag, 0.55% Pb and 0.15% Zn from a 0.60 m channel sample at the opening to the mine. Some cleaning and rehabilitation of the old workings will be necessary before a proper underground sampling program can be undertaken.

Las Guasimas and the Paulina Breccia zone appear to be along strike from each other, this potentially extends the length of the vein system for approximately 1,100 metres. Furthermore, preliminary mapping and prospecting indicate that other parallel veins exist, and this system is 6.5 kilometres from the Minas Nuevas zone on the Potrero block, indicating a district scale mineralizing system.

The newly discovered polymetallic veins have a northeasterly trend as opposed to the dominantly northwesterly trend of the gold-silver veins in the northern part of the Potrero property. Follow-up mapping, sampling and prospecting is continuing on both the MF2 and El Potrero blocks.

Eight channel samples were taken at Minas Nuevas, two at Las Guasimas (plus the two ‘dump grabs’) and 33 on the Paulina Breccia, sampling both vein and wall rock material. Wall rock is unmineralized.

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.

El Potrero is located in the Sierra Madre Occidental of western Mexico and lies within 35 kilometres 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.

A previously operational 100 tpd plant on site can be refurbished / rebuilt and historic underground mine workings rehabilitated at relatively low cost in order to achieve near-term production once permits are in place. The property is road accessible with a power line within three kilometres.

Pinnacle will earn an initial 50% interest immediately upon commencing production with the goal 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.

Pinnacle Silver and Gold is focused on the development of precious metals projects in the Americas. In the Red Lake District of northwestern Ontario, the Company owns a 100% interest in the past-producing, high-grade Argosy Gold Mine and the adjacent North Birch Project.

Source: Pinnacle Silver and Gold Corp.