Sonoro Gold drills 10,000 metres at Cerro Caliche

VANCOUVER, Canada, Sept. 01, 2026 (GLOBE NEWSWIRE) -- Sonoro Gold Corp. (TSXV: SGO | OTCQB: SMOFF | FRA: 23SP) (“Sonoro” or the “Company”) is pleased to announce assay results from the initial 10,000 meters completed as part of an ongoing 50,000-meter drilling campaign at the Company’s flagship Cerro Caliche gold project in Sonora, Mexico. The objective of the program is to potentially increase the size, grade and classification of the project’s mineral resource as well as confirm structural continuity of the northwest-trending mineralized corridors. A total of 46 reverse circulation drill holes were completed at the central-western region of the property where the Company proposes to develop an open-pit, heap leach mining operation as outlined in the technical report titled “Updated Mineral Resource Estimate and Preliminary Economic Assessment on the Cerro Caliche Gold Project,” dated December 4, 2025 (the “PEA”).

Highlights:

SCR-340

18.29m @ 3.392 g/t Au, 44.3 g/t Ag including:

9.14m @ 6.438 g/t Au, 85.8 g/t Ag

SCR-347

13.71m @ 0.704 g/t Au including:

1.53m @ 4.439 g/t Au

SCR-348

9.14m @ 3.076 g/t Au, 26.1 g/t Ag including:

6.09m @ 4.531 g/t Au, 37.5 g/t Ag

SCR-349

18.29m @ 1.674 g/t Au, 30.4 g/t Ag including:

6.10m @ 4.568 g/t Au, 84.6 g/t Ag

SCR-356

15.24m @ 0.648 g/t Au including:

3.04m @ 1.299 g/t Au

SCR-363

10.66m @ 0.935 g/t Au including:

4.57m @ 1.6 g/t Au

Infill drilling confirms geological continuity and expansion of known mineralized zones while step-out drilling confirms both lateral and depth extensions of the mineralized corridors. Infill drilling at the already significant mineralized vein zone of Buena Suerte also confirmed mineralization in areas previously designated as waste. Targeted drilling at El Quince, the intermediate area between the central and western mineralized corridors, identified the area as a