Pierre, South Dakota Pierre, South Dakota Pierre (; Lakota: "čhúŋkaške", "fort") is the state capital of the U.S. state of South Dakota, and the county seat of Hughes County. The population was 13,646 at the 2010 census, making it the second-least populous state capital in the United States after Montpelier, Vermont, and the eighth-most populous city in South Dakota. Founded in 1880 on the east bank of the Missouri River opposite Fort Pierre, Pierre has been the state capital since South Dakota gained statehood on November 2, 1889. It was challenged by Huron for the capital and won because of its location in
South Dakota Highway 87 of Hill City. South Dakota Highway 87 South Dakota Highway 87 (SD 87) is a state highway in the southwestern part of the U.S. state of South Dakota. It travels through the Black Hills region. The highway's southern terminus is at an intersection with U.S. Route 385 (US 385), about southeast of Pringle, within the southwestern part of Wind Cave National Park. Its northern terminus is at an intersection with US 16/US 385 about south-southwest of Hill City, within the east-central part of the Black Hills National Forest. The highway travels through Wind Cave National Park and Custer State Park.