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 11/30/2024

  • AVALANCHE FORECAST: Surface instabilities like storm and wind slabs have become increasingly unlikely in the days since our last storm. However, a concerning structure of strong, new storm snow over weak, old facets exists in isolated areas, particularly in the northern half of the forecast area. As you head out into the backcountry, it's worth building in larger terrain margins to account for this uncertainty. 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 Dog Sledding Snowmobiling Snowshoeing
L Trail - Groomed Snowmobile Trail 5.4 Snow Cross Country Skiing Dog Sledding Snowmobiling Snowshoeing

Related Experiences

Related Experiences

Experience Rating Length (mi) Surface Duration
Dog Sledding the Lookout Mountain Loop 7.4 Snow Half day
Four-Wheel Driving the Lookout Mountain Loop 21.4 Sand Less than 4 hours
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