Review & Frequenly Asked Questions:

Around the year 1350, Obsidian Dome, along with nearby Glass Creek Dome and Deadman Creek Dome, all erupted, and in the centuries following the aftermath of the magma, some really unique geology has been left behind. To reach Obsidian Dome, visitors can drive about three miles on a road which also leads to Glass Creek Dome, to a parking spot with an easy walk up to the top. At Obsidian Dome, visitors will find craters where magma once exploded from the ground, and some really unique rock formations, including several very different types of obsidian, like the vesicular rock found near the top of the dome, which is named for the bubbles in the obsidian caused by gas in the magma.

Rating: ⭐⭐⭐⭐⭐

Mammoth Mountain Convict Lake Rainbow Falls Devils Postpile National Monument Mammoth Lakes Welcome Center Lake Mary Minaret Vista Mammoth Brewing Company Hot Creek Crystal Lake Trail Mammoth Mountain Bike Park Obsidian Dome Mammoth Adventure Center Tamarack Cross Country Ski Center Mammoth Rock 'N' Bowl Horseshoe Lake Hot Creek Fish Hatchery Ground Up Climbing Guides Mammoth Crest Trail McGee Creek Skelton Lake Wild Willy's Hot Springs Crowley Lake Garnet Lake Mammoth Museum at the Hayden Cabin

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