Obsidian Dome Trail

Obsidian Dome Trail climbs the youngest volcanic feature in the Mono-Inyo Craters chain, a 1350 AD lava dome that erupted pure volcanic glass across Mono County’s high desert. The 4-mile route ascends through fields of razor-sharp obsidian chunks that Native Americans once traveled hundreds of miles to harvest for tools and weapons. The dome’s summit offers commanding views across Mono Lake and the Eastern Sierra, with glass fragments glinting like black diamonds under the desert sun.

Moderate difficulty requires high-clearance 4WD and serious tire protection — the obsidian will slice sidewalls faster than a knife through paper. All-terrain tires minimum, but even heavy-duty treads take a beating on the volcanic glass. Best accessed May through October when snow clears the high desert. No permits required, but respect the archaeological significance — obsidian tool-making sites are protected cultural resources. Bring tire repair kit, extra water, and respect for one of California’s most unique geological formations.