• America's First

    Devils Tower

    National Monument Wyoming

Contact Us

By Mail
P.O. Box 10
Devils Tower, WY 82714-0010

- or -

For FedEx / UPS
Hwy 110 Bldg 170
Devils Tower, 82714

By Phone
Visitor Information
(307) 467-5283

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Did You Know?

Close up of phonolite

Devils Tower is made of phonolite porphyry. Phonolite refers to the ringing of the rock when a small slab is struck, and its ability to reflect sound. Porphyry refers to its texture, large crystals of feldspar embedded in a mass of smaller crystals.