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The long, hexagonal columns of rock that make up the Devils Postpiles were formed tens of thousands of years ago by volcanic lava, which cooled and cracked to form the unique geological phenomenon. First established as a national monument by proclamation of the president in 1911, Devil’s Postpile was once part of Yosemite National Park until the mining industry separated it from the rest of the region. Devil’s Postpile National Monument is home to this incredible 60 foot high formation, known in the geology world as columnar basalt, but it is also home to several other great and beautiful hiking destinations, including the 101 foot high spectacle that is Rainbow Falls.

Devils Postpile Access Road, Mammoth Lakes, CA 93546, Phone: 760-934-2289

Rating: ⭐⭐⭐⭐⭐

Mammoth Mountain Convict Lake Rainbow Falls Devils Postpile National Monument Mammoth Lakes Welcome Center Lake Mary Minaret Vista Mammoth Brewing Company Hot Creek Crystal Lake Trail Mammoth Mountain Bike Park Obsidian Dome Mammoth Adventure Center Tamarack Cross Country Ski Center Mammoth Rock 'N' Bowl Horseshoe Lake Hot Creek Fish Hatchery Ground Up Climbing Guides Mammoth Crest Trail McGee Creek Skelton Lake Wild Willy's Hot Springs Crowley Lake Garnet Lake Mammoth Museum at the Hayden Cabin

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