Rio Grande Resources Advances Winston Gold-Silver Project with Second Phase of Field Sampling and Mapping in Support of Phase 1 Drill Program

VANCOUVER, BC / ACCESS Newswire / May 6, 2026 / Rio Grande Resources Ltd. (CSE:RGR)(OTCQB:RGRLF) ("Rio Grande" or "RIO" the "Company"), is pleased to announce a second phase of field sampling and mapping in support of planning efforts for its upcoming Phase 1 drill program at the Winston Gold-Silver Project ("Winston" or the "Project"), located in the Black Range Mountains of Sierra County, New Mexico.