Sylvania Mountains Wilderness is a federally designated wilderness area in eastern California near the Nevada line, created by the California Desert Protection Act of 1994 and managed by the Bureau of Land Management. Encompassing 18,677 acres, it includes a subrange of the Last Chance Mountains with rounded summits, canyons, broad bahadas, and elevations from 4,640 to 7,970 feet. Its vegetation shifts from desert scrub and Joshua trees at lower levels to pinyon woodland, sagebrush, and Utah juniper higher up. Scarce springs support wildlife, while White Cliff Canyon, old mining remains, wildflowers, and harsh heat make it a rugged, seldom-visited landscape.