The almost vertical monolith known as Devils Tower rises 1,267 feet above the Belle Fourche River. It is the remain of an ancient volcanic feature. President Theodore Roosevelt established Devils Tower National Monument on September 24, 1906. The spectacular rock formation known as Devils Tower and the surrounding countryside, home to abundant plant and animal life, attract visitors from around the world. Climbers test their skills on vertical rock walls.
Visitors enjoy the beauty of the area and enjoy the activites offered at the monument.
American Indians consider the area sacred, a place for prayer and renewal. Numerous theories have evolved since the official discovery of Devils Tower. Geologists Carpenter and Russell studied Devils Tower in the late 1800s and came to the conclusion that the Tower was indeed formed by an igneous intrusion. Later geologists searched for further explanations. In 1907, scientists Darton and O'Hara decided that Devils Tower must be an eroded remnant of a laccolith.