Devils Postpile National Monument

End of CA-203 West
Mammoth Lakes, CA 93546

Toll free phone: 760-934-2289

Local phone: 760-934-2289

Reds Meadow Road opens mid-June: Closes in fall.

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.

Traveler Reviews

TripAdvisor Traveler Rating

Overall Rating: 4.5

based on 964 reviews

A must see
When I was a kid about eight years old my aunt brought back pictures from the Devils Postpile national monument, I was absolutely amazed at this location. Finally this year I was able to visit it for...
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Hiking Through
You can see Devils Postpile off the John Muir Trail but if you want to visit the ranger station you need to go off trail. Neat place to visit. It’s not far from Reds Meadows.
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Beautiful hiking area
Fascinating basalt formations in the monument itself and a very nice hiking area in general. The bus access allows you to do one way hikes in the area using it as a shuttle and the considerable...
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Full day

Guides & Tours



The four sites at Agnew Meadows Group Camp in the Reds Meadow Valley area are structured to accommodate groups of 10-20 people. Located in a lovely wilderness area with meadows, streams and hiking trails galore. Amenities within a few minutes include a general store, showers and a pack station. This...
Established in 1911 by presidential proclamation, Devils Postpile National Monument protects and preserves the Devils Postpile formation, the 101-foot high Rainbow Falls and pristine mountain scenery. The formation is a rare sight in the geologic world and ranks as one of the world’s finest examples of columnar basalt.  Visitors can...
The 101-foot waterfall is part of the Devils Postpile National Monument. It is known for the colorful rainbow that its mist creates. The best time to experience the rainbows is midday, when the sun is highest. Mandatory Scenic Shuttle The mandatory shuttle is operated by Eastern Sierra Transit and boards...
Launch your outdoor adventure from Mammoth Mountain’s activity hub. Eurobungee trampolines, a zip line and a rock-climbing wall are the perfect way to spend an afternoon around the Main Lodge. Plus, you can access other adventure activities, like mountain biking, archery with foam-tipped arrows, a scenic gondola ride to the...