“A Geologic Wonder”
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. Its columns tower 60 feet high and display an unusual symmetry.
Encompassing the Devils Postpile formation, Rainbow Falls and acres of stunning mountain scenery, Devils Postpile National Monument is a Mammoth Lakes must-see. The natural landmark is typically open from mid-June through mid-October.
Resembling a tidy lumber pile created by giants, Devils Postpile’s 60-foot basalt columns were formed when lava erupted in the valley nearly 100,000 years ago and filled the area to a depth of 400 feet. Then, glaciers overrode the fractured mass of lava and quarried away one side of the postpile about 10,000 years ago, exposing and polishing a sheer wall of columns.
To hike Devils Postpile, take the half-mile trail to the base, then continue uphill to the formation’s summit for incredible views. Or ramble the 2.5-mile route from the ranger station to 101-foot Rainbow Falls.
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Devil's Postpile National Monument
- Sun - Sat: 12:00 am - 11:59 pm
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Not Wheelchair Accessible
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