GR Silver Mining Ltd. announce that it has initiated a 14,000 m exploration drill program targeting newly identified and untested silver-gold (Ag-Au) veins on its concessions within the Rosario Mining District, Sinaloa, Mexico. Seven drill rigs are being mobilized to undertake this program at new project sites on the Company's extensive Ag-Au vein systems that extend over structural trends covering a combined 75 km strike length of the Plomosas, San Marcial and La Trinidad Project Areas. After successful completion of the resource drill programs at the Plomosas Mine Area and the San Juan Area (both within the Plomosas Project), exploration efforts are now focused on testing Au and Ag-rich veins that have seen little or no exploration activity. While the program includes previously identified veins, several of the targets to be drilled are new discoveries identified by the Company's mapping and prospecting teams. Among the recently discovered epithermal vein and breccia targets to be tested are the GAP Area system, which connects the San Marcial and San Juan areas, and also Au-rich epithermal mineralization identified to the south of the Plomosas Mine Area ("Plomosas South"). The first two rigs have commenced a 16-hole drill program at Plomosas South that provides step-out extension potential to the resource estimate currently underway on the Plomosas Mine Area. The GAP Area was covered by the recently completed NW extension of the San Marcial ground geophysical (IP and magnetometry) program, extending from the San Marcial Project northwesterly to the San Juan Area. Another new area that is being prepared for drilling is the Loma Dorada structure, an epithermal Au vein target which is on the northern extension of the La Colorada vein system, where the Company recently released high grade results from LCS21-04 containing 0.65 m at 10,777 g/t AgEq. A significant mapping and drill program has commenced at the El Saltito vein system in the western portion of the Plomosas concessions. Further details on specific programs at the new drill target sites will follow.