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Mammoth Lakes, California, USA

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Devils Postpile National Monument  
P.O. Box 3999
Mammoth Lakes, CA 93546

Established in 1911 by presidential proclamation, this national monument protects and preserves the Devils Postpile formation, the 101-foot high Rainbow Falls, and pristine mountain scenery. The formation of Devils Postpile began when basalt lava erupted in the valley of the Middle Fork of the San Joaquin River and it is a rare sight in the geologic world, ranking as one of the world’s finest examples of columnar basalt. Its columns tower 60 feet high and display an unusual symmetry.

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Mammoth Lakes Area Attractions

Mammoth Brewing Company
Devils Postpile National Monument
Old Schoolhouse Museum
Mammoth Ski Museum
Hayden Cabin
Laws Railroad Museum and Historical Site
Eastern California Museum


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