Pinnacle Discovers More High-Grade Polymetallic Mineralization at El Potrero with Silver Assays up to 1,159 grams per tonne Underscoring District Scale Potential

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Pinnacle Discovers More High-Grade Polymetallic Mineralization at El Potrero with Silver Assays up to 1,159 grams per tonne Underscoring District Scale Potential (TheNewswire) VANCOUVER, BRITISH COLUMBIA – TheNewswire - April 20, 2026 (TSXV: PINN, OTC: PSGCF, Frankfurt: P9J) – Pinnacle Silver and Gold Corp. ("Pinnacle" or the “Company") is pleased to announce that 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 (see Pinnacle news release from March 17, 2026). HIGHLIGHTS Ground follow up of the recent airborne LiDAR survey on the Potrero Project has resulted in the discovery of new zones of polymetallic mineralization, enhancing the district scale potential of the project   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  “These exciting discoveries of high-grade gold-silver-lead-zinc mineralization not only validate the effectiveness of the LiDAR survey, but are demonstrating the district scale potential of the mineralizing system at El Potrero,” stated Robert Archer, Pinnacle’s President & CE...

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