Scientists debate how Devil’s Tower was formed, but agree that about 65 million years ago, molten lava was forced into existing hard rock formations, cooling and eroding over millions of years into this striking formation that stands 1,267 feet above the landscape. The site is sacred to the Lakota people and many other Plains Tribes, and President Theodore Roosevelt declared it the nation's first national monument in 1906.
More about Devils Tower
Trip Great American West From Mount Rushmore and the Crazy Horse Memorial to Custer State Park and Devils Tower, the West is a colorful storybook spilling over with strong personalities and profoundly historic landscapes. Discover some new chapters and add your own footnotes on this fun and engaging exploration.