Subway Cave


Hike one-third mile into the largest accessible tube of the Hat Creek Lava Flow, a flow that was discharged in a series of north-south fissures about 24,000 years ago. This river of lava, located near the town of Old Station, crawled northward 16 miles, covering the floor of Hat Creek Valley. While the top crust cooled and hardened, rivers of red-hot lava insulated by newly formed rock above, continued to flow underneath. Eventually, the lava drained away, leaving hundreds of tube-like caves. The entrance to this cave was formed by a partial collapse of the cave’s roof many years ago. Don’t forget to bring your flashlight. Restrooms, water, and picnic tables are available.


43225 E. Highway 299
Fall River Mills, CA 96028


40.70914140, -121.41798020
Visit Website
(530) 336-5521

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