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.

Avalanche Forecast for 04/16/2021

  • AVALANCHE FORECAST: As rising temperatures and sunshine warm slopes today, small Loose-Wet sloughs that could grow to become consequential will become possible on steep slopes. Avalanche danger will rise to MODERATE progressively on E to S to W facing slopes at all elevations and N aspects at low elevations. Find out More

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Related Trails

Related Trails

Trail Length (mi) Surface Activities and Services
A Trail - Groomed Snowmobile Trail 13.2 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
Snowmobiling the A Trail and L Trail from Sawmill Cutoff Road to Lookout Mountain 11.0 Snow Half day
How to get involved Local recreation resources Experiences and ratings Finding your way around the MLTS Trail System Projects