Devils Tower

Devils Tower is an isolated igneous monolith in northeastern Wyoming, United States, noted for its steep columnar jointing and vertical rock faces. It was declared the nation’s first national monument in 1906.

The feature rises sharply from the surrounding plain to form a prominent summit and is a focal point for climbing, hiking and geology observation. Climbing routes cover the flanks of the tower, and a marked trail circles the base to view the columns and talus slopes.

Geologically, the structure is an intrusive igneous formation exposed by erosion of the surrounding sedimentary rocks; it has long held cultural and ceremonial significance for several Native American tribes. Federal protection has preserved the site and its immediate landscape since the early 20th century.

The tower stands above the prairie in Crook County in northeastern Wyoming, near small communities such as Hulett and the unincorporated area named for the feature; it occupies a solitary, easily visible position on the local landscape and is managed as a national monument.

• Protection status: Designated as the first U.S. national monument in 1906, providing federal protection and visitor services under the National Park Service.
• Climbing and geology: The exposed columnar jointing and hexagonal columns make the tower a notable destination for rock climbing and geology study; there are more than 200 documented technical climbing routes.