Devils Tower

Devils Tower National Monument protects America's first national monument, established by President Theodore Roosevelt on September 24, 1906. This striking geological formation rises 867 feet from its base to an elevation of 5,112 feet above sea level, towering 1,267 feet above the Belle Fourche River in northeastern Wyoming's Black Hills region. The monument encompasses 1,347 acres of mixed-grass prairie, pine forest, and riparian habitat surrounding this iconic igneous rock formation.

The monument supports diverse wildlife including white-tailed and mule deer, wild turkeys, and prairie dogs that inhabit colonies visible from hiking trails. Over 100 bird species have been documented, with prairie falcons and other raptors nesting on the tower's columnar faces. Black-tailed prairie dogs maintain active towns near the visitor center, serving as keystone species supporting numerous predators. Reptiles including bull snakes and prairie rattlesnakes occur in grassland habitats.

The monument's vegetation reflects its position at the interface between Great Plains grasslands and Black Hills ponderosa pine forests. Bur oak woodlands, cottonwood riparian corridors, and mixed-grass prairie create habitat diversity. Spring wildflowers include pasqueflower, prickly pear cactus, and yucca. The base of the tower supports diverse plant communities adapted to boulder fields and rocky substrate.

Devils Tower formed approximately 50 million years ago when magma intruded into sedimentary rocks and cooled slowly underground. Erosion over millions of years removed softer surrounding sediments, exposing the resistant phonolite porphyry core. The tower's distinctive columnar jointing formed as the molten rock contracted during cooling, creating hundreds of four- to six-sided columns averaging four feet in diameter. Some columns reach over 600 feet in length, making the tower one of the finest examples of columnar jointing on Earth.

The monument experiences a semi-arid continental climate with cold winters and warm summers. Average January temperatures range from 10 to 35 degrees Fahrenheit, while July temperatures reach 55-85 degrees. Annual precipitation averages about 16 inches, with May and June typically being the wettest months. Summer thunderstorms can develop quickly, creating hazardous conditions for climbers on the tower.

Devils Tower holds profound spiritual significance for more than 20 Northern Plains tribes including the Lakota, Cheyenne, Kiowa, and Crow peoples, who know it by names including Bear's Lodge, Bear's Tipi, and Tree Rock. Tribal oral traditions explain the tower's creation through stories of bears scoring the rock while pursuing children who were lifted to safety. Native American ceremonies including sun dances and sweat lodges continue at the monument today.

Colonel Richard Irving Dodge led the first documented non-Indigenous expedition to the tower in 1875, and his expedition geologist coined the name Devils Tower. William Rogers and Willard Ripley made the first recorded ascent on July 4, 1893, using wooden ladder pegs driven into a crack. President Theodore Roosevelt designated it as America's first national monument in 1906 under the newly passed Antiquities Act, protecting its geological and scientific values.

The 1.3-mile paved Tower Trail circles the monument's base, offering views of columnar jointing, talus slopes, and rock climbers. Longer trails including Red Beds Trail, Joyner Ridge Trail, and Valley View Trail traverse surrounding prairies and forests. Devils Tower attracts thousands of rock climbers annually, with over 200 established routes ranging from moderate to extremely difficult. The monument's dark skies provide excellent stargazing opportunities.

The visitor center provides exhibits on geology, natural history, and cultural significance, along with a bookstore operated by the Devils Tower Natural History Association. A 50-site campground operates seasonally on a first-come basis. The monument is located off Highway 24, accessible from Interstate 90 via exits at Sundance or Moorcroft. Entrance fees apply, with various pass options available.

The National Park Service manages a voluntary climbing closure during June to respect Native American cultural practices. Prairie dog colony management balances ecosystem function with visitor safety and infrastructure protection. Invasive species control targets non-native plants threatening native grassland communities. Cultural resource protection preserves Native American sacred sites and archaeological features throughout the monument.