• Devils Postpile Formation

    Devils Postpile

    National Monument California

There are park alerts in effect.
show Alerts »
  • Devils Postpile National Monument Road Closed for the Season

    The road to Devils Postpile has been closed for the season. This will be updated as soon as a 2014 opening date has been announced.

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?

The John Muir and Pacific Crest trails take hikers into the Ansel Adams Wilderness.

The John Muir and Pacific Crest Trails join into one trail in the monument. Many "through-hikers" take advantage of the shuttle system and other amenities at Devils Postpile to refuel and rest. More...