Lookout Mountain

  • Formed by a series of volcanic eruptions nearly 700,000 years ago, Lookout Mountain is a dominant feature to the north of Mammoth Lakes and east of Hwy. 395. Accessible by graded gravel road in summer and by snowmobile in winter, the summit features a mile-wide crater and provides an excellent 360-degree vantage from which to see the eastern scarp of the Sierra and the various features of the Long Valley Caldera. Historically the dome was an important source of pure obsidian to make spear and arrow points.

  • Formed by a series of volcanic eruptions nearly 700,000 years ago, Lookout Mountain is a dominant feature to the north of Mammoth Lakes and east of Hwy. 395. Accessible by graded gravel road in summer and by snowmobile in winter, the summit features a mile-wide crater and provides an excellent 360-degree vantage from which to see the eastern scarp of the Sierra and the various features of the Long Valley Caldera. Historically the dome was an important source of pure obsidian to make spear and arrow points.

Destination Alerts

  • 03/12/2018: SNOW AND WINTER CONDITIONS EXIST ABOVE 8000 FEET. EARLY SPRING CONDITIONS EXIST ON LOWER ELEVATIONS.

Avalanche Forecast for 04/26/2018

  • Loose Wet avalanches continue to be the primary concern through the forecast period. Timing is key to avoiding Loose Wet avalanches. Plan your travels to be clear of steep slopes before the snow become unsupportive. Signs the snow is becoming increasingly saturated, loose, and potentially unstable: pinwheels or rollerballs, small wet sloughs, and deep ski or boot-top penetration are indicators that the snow is becoming increasingly unstable and Loose Wet avalanches are becoming increasingly poss Find out More

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Related Trails

Related Trails

Trail Length (mi) Surface Activities and Services
A Trail - Groomed Snowmobile Trail 13.9 Snow Cross Country Skiing Snowmobiling Snowshoeing
L Trail - Groomed Snowmobile Trail 5.4 Snow Cross Country Skiing Snowmobiling Snowshoeing

Related Experiences

Related Experiences

Experience Rating Length (mi) Surface Duration
Dog Sledding the Lookout Mountain Loop 7.4 Snow Half day
Motorized Trail Riding Lookout Mountain Loop 11.6 Soil Less than 4 hours
How to get involved Local recreation resources Experiences and ratings Finding your way around the MLTS