Lava Tube is a conduit where lava once flowed, cooled and created a cave-like hole in the rock above Lower Twin Lake. This geologic formation is commonly referred to as "Hole in the Wall." The Lava Tube is a popular destination for backcountry skiing: skiers begin from from the back side of Mammoth Mountain, an out-of-bounds area, and descend the experts-only slope through the rocky tunnel. Winter visitors are advised to view Lava Tube from the eastern shore of the lake because of avalanche danger. In the summer, you can walk around the lake for a closer look.
Lava Tube
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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From the Dragon's Back Access point, take the Dragon's Back Trail to Lava Tube. Note that the trail sign incorrectly reads "Mammoth Mountain Trail."
*Note that not all facilities are accessible via public transit.
Related Trails
Mammoth Mountain Trail
3.9 mi
- Surface: Soil
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Seven Lakes Point Loop
0.6 mi
- Surface: Soil
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Related Trails
| Trail | Length (mi) | Surface | Activities and Services |
|---|---|---|---|
| Mammoth Mountain Trail | 3.9 | Soil |
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| Seven Lakes Point Loop | 0.6 | Soil |
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