• Devils Postpile Formation

    Devils Postpile

    National Monument California

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  • 37-Foot Vehicle Length Restriction on the Devils Postpile Access Road

    Devils Postpile has a limit of 37 feet for vehicles on the monument road. This may change during weather events, construction activities, vehicle congestion, or for safety reasons. Call or email for more information. More »

Natural Features & Ecosystems

Nature and Science

Devils Postpile National Monument was established because of two important geophysical features: the postpile itself and RainbowFalls. The postpiles tower as a sheer wall of polygonal basalt columns up to 60 feet high, and glacial polish is evident on top of many of the columns.

Rainbow Falls is a spectacular waterfall that exists near the southern end of the monument on the San Joaquin River. The river changes in character many times throughout its journey through the monument, evolving along its course from a series of broad low-gradient meanders to scattered pools and fast-flowing rapids, cascades, and falls.

Did You Know?

Flames from the Rainbow Fire came dangerously close to Reds Meadow Resort, just one and a half miles from the Monument.

The 1992 Rainbow Fire, which was sparked by a lightning strike, burned 82% of Devils Postpile National Monument.