Crook County, Wyoming, serving as a western gateway to the Black Hills, is a place of varied terrain that includes the state's lowest elevation, 3,125 feet, north of Aladdin, and Warren Peak at 6,800 feet. Its communities include Sundance, where Harry Longabaugh gained the name "Sundance Kid" after imprisonment for horse stealing. Long favored as a hunting ground by Plains Indian tribes, the area that became Crook County saw few white men before 1874, when Lieutenant Colonel George A. Custer's military expedition passed near this point before discovering gold in the Black Hills. Gold-hungry prospectors soon poured in despite the Fort Laramie Treaty of 1868 reserving the Black Hills for the Sioux Nation. Bloody conflict followed, and General George Crook, for whom the county is named, played an instrumental role in defeating the Indians and confining them to reservations, opening the county to white settlement. In 1876, gold seekers founded Beulah, the county's oldest town, but although gold first drew newcomers, ranching became its lasting source of wealth. After the Civil War, great cattle drives brought Texas Longhorns to the northwestern plains, and herds moved through Moorcroft and western Crook County on the Texas Trail, helping begin a cattle kingdom in Wyoming. In modern times, stockraising, lumbering, oil, and tourism are important to the county economy, with scenic Devils Tower, the nation's first national monument, the Black Hills National Forest, and Keyhole State Park drawing visitors.