• 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 »

Be A Junior Ranger

Devils Postpile Junior Ranger Book

Devils Postpile's Junior Ranger book

During the summer months, kids can come to the monument's ranger station where a park ranger will give them a free Junior Ranger book to complete.

All kinds of fun and interesting activities can be found within the pages of these Junior Ranger booklets, including drawing, word scrambles, puzzles, and writing exercises. During the summer, park rangers are always available to lend a helping hand with these activities.

Upon completion of the booklet, kids get to take the Junior Ranger oath with a real park ranger! Once sworn in, they receive an official Junior Ranger badge and certificate.

Didn't get to complete the Junior Ranger program while you were here? Send in your booklet and we'll send you your free badge and signed certificate! Click here for our address.

Want a head start on completing the Junior Ranger book? Download a copy and print it at home.


Internet Resources

Whether you are able to visit Devils Postpile and become a Junior Ranger or not, there are many parks that have on-line Junior Ranger Programs. Follow this link for some great rainy day Junior Ranger activities!

Did You Know?


The Devils Postpile that you see today is only a fraction of the size the original lava flow formation that filled this valley. Natural processes, especially glaciers, have eroded the rest.