Grass Valley Wilderness is a protected desert area in San Bernardino County, California, near Ridgecrest, established by the California Desert Protection Act of 1994 and managed by the Bureau of Land Management’s Ridgecrest Field Office. Its Mojave Desert landscape consists largely of low hills and broad, flat desert, with creosote bush, desert scrub, and isolated stands of Joshua trees. The area provides habitat for wildlife including the desert tortoise and the Mohave ground squirrel. Naval Air Weapons Station China Lake borders it on the east, and a non-wilderness road runs through the area.