Long Valley Caldera Region
The long valley Caldera is the massive, depressed area with Mammoth Lakes to the West, Crowley Lake to the Southeast and the Glass Mountains to the North.
Recreation Sites
Earthquake Fault
Site Open
A more appropriate name for the nearly straight fracture would be "Earthquake Fissure." Because the rocks on both sides have not moved much vertically of laterally relative to one another, it is…
Hot Creek Geologic Site
Site Open
Hot Creek is a place to marvel at geology in action. Boiling water bubbling up from the creek bed, fumaroles and periodic geyser eruptions at Hot Creek attest to the chamber of hot magma which lies…
Inyo Craters
Site Open
The Inyo Craters are three north-south-aligned phreatic (steam) explosion craters on the summit and south flank of Deer Mountain. Deer Mountain is an approximately 115,000-year-old rhyolite dome in…
Inyo Craters Trailhead
Site Open
 There are several multi-use trails near Deer Mountain and Inyo Craters. Link to additional area information for Inyo Craters