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 02/04/2023
- AVALANCHE FORECAST: Small and reactive wind slabs may be possible to find in leeward catchment zones near and above treeline today. Be on the lookout for fresh deposits, and be wary of terrain features that elevate the consequences of an avalanche. Avalanche hazard is expected to rise very quickly tonight as a strong winter storm enters the region. 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 |
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Mammoth Mountain Trail | 3.9 | Soil |
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Seven Lakes Point Loop | 0.6 | Soil |
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