• Devils Postpile Formation

    Devils Postpile

    National Monument California

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

    Devils Postpile is open for the 2014 season. The ranger station will be open daily from 9am-5pm. The Devils Postpile campground is open. Ranger walks to Devils Postpile occur daily at 11 am. More »

Geologic Formations

Devils Postpile National Monument was created to protect one of the best examples of columnar basalt in the country. The geologic story of the monument, however, neither begins nor ends with the Postpile itself. Although that is a very important part of the story, the rest of it involves violent uplifts, rivers of fire and ice, and the slow workings of wind and water to form the magnificent geology of this area. To learn more, visit our geology page.

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...