Obsidian Dome Observation Site

Created by a Phreatic Blast - the explosion that takes place when magma reaches the water table and turns the water to steam - and the magma pushing up and cooling to create rock. This large dome is located West of Highway 395 north of Mammoth Lakes.

Current Conditions

Vehicle travel limited depending on snow.

General Information

Open 24 hours/day

No fees are required for this site

Dogs must be leashed in all developed recreation sites.

Getting There

Latitude / Longitude

Latitude: 37.757829

Longitude: -119.026431

Elevation

8556' (summit)

Directions

From the town of Mammoth Lakes drive west on Hwy 203 to the 395 junction. Take 395 north for 10 miles and take a left on Glass Flow Rd/ Obsidian Dome Rd.