Lava Tube

  • 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 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.

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
  • Destination Activities

    • Ski & Snowboarding

    Public Services

    Hours of Operation: N/A

    Season: Year Round

Reviews

Submit a review

Related Trails

Related Trails

Trail Length (mi) Surface Activities and Services
Mammoth Mountain Trail 3.9 Soil Hiking
Seven Lakes Point Loop 0.6 Soil Hiking Vista Viewing
How to get involved Local recreation resources Experiences and ratings Finding your way around the MLTS Trail System Projects