Bear Mountain, the outstanding feature of this state park, is a unique volcanic laccolith (bubble) that rises 1400 feet above the surrounding plains. Still roamed by a small herd of buffalo at its base, the mountain is regarded by the Plains Indians as a sacred site; its ceremonial area is visited by thousands every summer. Artifacts more than 10,000 years old have been found at the site.
Recreation includes a small lake with boat ramp, lakeside use area with basic campsites, a one-mile loop Ceremonial Trail with an outstanding view of four states, and an interpretive center at the base of Bear Butte which provides historic and cultural information. Special group arrangements are encouraged, and guided hikes are available with advance notice. The park is a National Natural Landmark site at the northernmost end of the 111-mile Centennial Trail, a designated National Recreation Trail that winds through the Black Hills to Custer State Park and Wind Cave National Park.