Mammoth Mountain

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The most prominent geological feature in the area, 11,053-foot Mammoth Mountain is a dormant composite volcano formed by a series of eruptions between 220,000 and 57,000 years ago. Steam-blast eruptions occurred from vents on the north side of the mountain as recently as 700 years ago. Since 1990, increases in earthquake swarms, gas venting and tree kills have led to heightened monitoring by the US Geological Survey. Extensive facilities for fee-based downhill skiing and snowboarding, as well as mountain biking in summer and an interpretive center on the summit, are operated under a lease with the US Forest Service.
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The most prominent geological feature in the area, 11,053-foot Mammoth Mountain is a dormant composite volcano formed by a series of eruptions between 220,000 and 57,000 years ago. Steam-blast eruptions occurred from vents on the north side of the mountain as recently as 700 years ago. Since 1990, increases in earthquake swarms, gas venting and tree kills have led to heightened monitoring by the US Geological Survey. Extensive facilities for fee-based downhill skiing and snowboarding, as well as mountain biking in summer and an interpretive center on the summit, are operated under a lease with the US Forest Service.

Avalanche Forecast for 11/15/2024

AVALANCHE FORECAST: Modest snowfall has begun to build our snowpack. Snow totals have been limited, with accumulations ranging from a dusting to about 13" at favored weather stations in the northern half of the forecast area. While avalanche concerns are minimal at the moment, it's important to remember the old adage: if there is enough snow to ride, there is enough snow to slide. Find out More

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Directions

Destination Activities
Public Services
Hours of Operation: All day

Season: Year Round
This destination is accessed directly from the Mammoth Mountain Ski Area Main Lodge.
- Get driving directions to Mammoth Mountain Ski Area Main Lodge
- Get public-transit options*
*Note that not all facilities are accessible via public transit.

Reviews

July 15, 2013

“Just did the hike. Very pleasant and comfortable. Took me 2.5 hours because I got lost when I reached Kamikaze Gate. At that junction, there is real need for some direction. The map there only shows the bike trails. Other than that it was great.”

Daniele S., California