Pinnacle hits 59.2 g/t Au and 424 g/t Ag with visible gold at El Potrero underground

VANCOUVER, BRITISH COLUMBIA, August 18, 2026 – TheNewswire - (TSXV: PINN, OTCQB: PSGCF, Frankfurt: P9J) – Pinnacle Silver and Gold Corp. (" Pinnacle " or the “ Company ") is pleased to provide an update on the ongoing underground drilling program at the Potrero gold-silver property in Durango, Mexico. As announced on May 5, 2026 , the program comprises more than 100 short, closely spaced holes from with the historic mine workings to better understand the size, shape and average grade of the mineralized zones.

HIGHLIGHTS

58 holes drilled to date out of a planned 108

Dos de Mayo vein displaying all the typical characteristics of a low sulphidation epithermal breccia vein

Drill holes from the upper level of the historic Pinos Cuates mine returned individual assays up to 59.2 grams per tonne gold (g/t Au) and 424 grams per tonne silver (g/t Ag) over 1.07 metres, where fine grained visible gold was observed

A horizontal hole, drilled at a shallow angle to the vein, extended the known strike length of the mineralization to the northwest by approximately 20 metres including a 13.18 metre core length assaying 9.69 g/t Au and 143 g/t Ag, while the southeast strike extent was extended with assays returning up to 9.54 g/t Au and 134 g/t Ag over 1.5 metres

Potential strike length of Pinos Cuates mineralized zone extended to at least 70 metres

To date, 58 holes have been drilled and assays received for the first 37. For logistical reasons, the first 16 holes were drilled at the portals of the three historic mines (three at Pinos Cuates, six at La Dura and seven at Dos de Mayo – see Figure 1 below) and these will be discussed once drilling is complete in those areas. The majority of the holes have been drilled on the two levels of the Pinos Cuates mine (Figure 2), th