Subway Cave in northern California is an easy, affordable and fun way to discover the area’s volcanic past.

Subway Cave is a lava tube that lies just under the rough surface of Lassen National Forest. Visitors can easily park and walk a short distance to the cave’s opening where stairs descend about twenty-five feet down into the darkness.

The cave walk is only 1,300 feet in distance but is otherworldly compared to the bright surface and hot summertime temperatures. The visibility inside the lava tube quickly becomes zero, so flashlights are required. Also, bring a light jacket, as the temperature inside the cave is an autumn-like 46 degrees. The cave has several chambers to explore and signs are marked to help guide you to the exit.

At the exit notice the large ‘hills’ that rise several hundred feet to the east, these are the edges of ancient lava flows. Also, look for the magnificent Lassen Peak to the south. The walk back to the car is about ten minutes. Subway Cave can easily be explored by family members of all ages.

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