DEVIL'S POSTPILE
Devils Postpile National Monument is a National Monument located near Mammoth Mountain in eastern California. The monument protects Devils Postpile, an unusual rock formation of columnar basalt.
Devils Postpile National Monument is a National Monument located near Mammoth Mountain in eastern California. The monument protects Devils Postpile, an unusual rock formation of columnar basalt.
![](https://www.mammothlakes.com/custimages/800px-Devils_Postpile_National_Monument_(4897074514)(1).jpg)