Devils Postpile National Monument
Rainbow Falls near Devils Postpile
Top of basalt columns, Devils Postpile National Monument

Devils Postpile National Monument

End of CA-203 West
Mammoth Lakes, CA 93546
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This unique geological structure features thousands of hexagonal basalt columns formed 100,000 years ago when lava flow slowed and then cooled and cracked. The area is accessible in summer months, and a mandatory shuttle offers visitors transportation to Devils Postpile and other Reds Meadow areas. Catch the shuttle from the Mammoth Adventure Center at Mammoth Mountain Main Lodge.

Visiting Devils Postpile requires a one-mile roundtrip hike. The trail is not fully accessible to wheelchairs at this time.


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