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 11/27/2024
- AVALANCHE FORECAST: Over the past five days, two storms brought periods of heavy snowfall, strong winds, and dangerous avalanche conditions to the region. As the weather settles, avalanches breaking in new and wind-drifted snow will become less likely. Be prepared to assess the recent snow for signs of instability, like cracking underfoot, before venturing into avalanche terrain. We have very limited information about the snowpack at mid and upper elevations. If old snow has formed weak layers near the base of the snowpack, you can expect avalanche conditions to settle more slowly. 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
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L Trail - Groomed Snowmobile Trail
5.4 mi
- Surface: Snow
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Related Trails
| Trail | Length (mi) | Surface | Activities and Services |
|---|---|---|---|
| A Trail - Groomed Snowmobile Trail | 13.2 | Snow |
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| L Trail - Groomed Snowmobile Trail | 5.4 | Snow |
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Related Experiences
Dog Sledding the Lookout Mountain Loop
7.4 mi
- Rating: ,
- Surface: Snow,
- Duration: Half day
Four-Wheel Driving the Lookout Mountain Loop
21.4 mi
- Rating: ,
- Surface: Sand,
- Duration: Less than 4 hours
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 | |
| 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 |
