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.
Lookout Mountain
Avalanche Forecast for 04/14/2024
- AVALANCHE FORECAST: New snow and strong winds will lead to fresh wind slab development near and above treeline today. Monitor snow accumulations closely and expect the size and distribution of concerning wind deposits to increase as you gain elevation and get closer to the crest. Find out More
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Destination Activities
Public Services
Hours of Operation: N/A
Season: Year Round
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This destination is accessed directly from the Junction of Highway 395 and USFS Route 3S06.
*Note that not all facilities are accessible via public transit.
Related Trails
A Trail - Groomed Snowmobile Trail
13.2 mi
- Surface: Snow
L Trail - Groomed Snowmobile Trail
5.4 mi
- Surface: Snow
Related Trails
Trail | Length (mi) | Surface | Activities and Services |
---|---|---|---|
A Trail - Groomed Snowmobile Trail | 13.2 | Snow | |
L Trail - Groomed Snowmobile Trail | 5.4 | Snow |
Related Experiences
Dog Sledding the Lookout Mountain Loop
7.4 mi
- Rating: ,
- Surface: Snow,
- Duration: Half day
Motorized Trail Riding Lookout Mountain Loop
11.6 mi
- Rating: ,
- Surface: Soil,
- Duration: Less than 4 hours
Snowmobiling the A Trail and L Trail from Sawmill Cutoff Road to Lookout Mountain
11.0 mi
- Rating: ,
- Surface: Snow,
- Duration: Half day
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 |