Lava Tubes

Lava Tubes are known as Subway Caves and is around 15-miles outside from the North entrance of the Lassen Volcanic NP.  The lava tube is ~1300 feet long and has interpretive signs but is not lit so flashlights are required. The floor is rough and uneven and the temperature is 46°F year round. Sturdy shoes are recommended and sleepers are definitely not.