Cheyenne Mountain, a prominent 9,565-foot landmark on the south side of Colorado Springs, stands where the Front Range meets the Great Plains and has long shaped both the landscape and human history of the area. Formed from granite tied to the Pikes Peak region, it marks an important ecological transition between grassland and montane forest and supports diverse wildlife. For thousands of years, Indigenous peoples including the Ute, Arapaho, and Cheyenne used the surrounding country for hunting and travel. Later homesteading, roads, mining, parks, and institutions such as North Cheyenne Cañon Park and the Cheyenne Mountain Zoo added new layers of significance, while the underground air defense complex gave it a modern military role.