Obsidian Dome is one of the most unique geologic features of the Eastern Sierra. From looking at preserved remnants of trees, geologists have determined that this young volcanic feature formed around 700 years ago, or at the beginning of the Renaissance Period, when steam-driven volcanic explosions created a conduit for silica-rich magma to reach the surface. Once this rapidly cooled, the otherworldly Obsidian Dome was formed.
What makes Obsidian Dome so unique is its composition of almost exclusively obsidian, which means the mountain is comprised entirely of volcanic glass! Because of this, the volcano was very important to indigenous peoples, who collected and traded the obsidian for use in tools, weaponry, and jewelry. Today, Obsidian Dome stands almost 400 feet above the surrounding forest floor and is barren of vegetation, making this moon-like landscape a great place for every member of the family to explore.
Getting There
From Mammoth Lakes, take California State Route 203 east (south) 1.5 miles to the intersection of Route 395. Travel 10 miles north on 395. Then, turn left onto the gravel Glass Flow/Obsidian Dome Road and follow that road for 2.5 miles.
Things to do
- Explore, climb, and hike around the unique Obsidian Dome
- Venture down a nearby trail into the Owens River Headwater Wilderness
- Go off-roading on nearby OHV trails
- Fish for brook trout in Glass Creek
Amenities
- Free parking
- Picnic areas
