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Keystone is a town in the Black Hills region of Pennington County, South Dakota, United States.The population was 240 at the 2020 census. [5] It had its origins in 1883 as a mining town, and has since transformed itself into a resort town, serving the needs of the millions of visitors to the Mount Rushmore National Memorial, which is located just beyond the town limits.
It splits from US 16 in the Black Hills of the southwestern part of the U.S. state of South Dakota. The highway's western terminus is an intersection with US 16, US 385, and South Dakota Highway 89 (SD 89) in Custer. The eastern terminus is at an interchange with US 16 called Keystone Wye south of Rapid City.
This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Pennington County, South Dakota, United States. The locations of National Register properties and districts for which the latitude and longitude coordinates are included below, may be seen in a map.
This is an accepted version of this page This is the latest accepted revision, reviewed on 25 February 2025. Mountain in South Dakota with sculptures of four U.S. presidents For the band, see Mount Rushmore (band). Mount Rushmore National Memorial Shrine of Democracy Tȟuŋkášila Šákpe Mount Rushmore features Gutzon Borglum's sculpted heads of George Washington, Thomas Jefferson, Theodore ...
It currently operates the 1880 Train on the former Keystone Branch of the Burlington Northern Railroad (BN) between Hill City, South Dakota and Keystone, South Dakota. This railroad line was originally built by the Chicago, Burlington and Quincy Railroad (CB&Q) to serve mining and timber interests in the Black Hills.
English: Locator map of Pennington County — in southwestern South Dakota. Date: 12 February 2006 (original upload date) ... Keystone, South Dakota; Keystone School ...
Map of the United States with South Dakota highlighted Sioux Falls, most populous city in South Dakota Rapid City, ... Keystone: 241 240 +0.42%: Pennington:
South Dakota Highway 40 (SD 40) is a state highway in southwestern part of the US state of South Dakota.The highway is just over 37 miles (60 km) long and runs from U.S. Route 16A (US 16A) in Keystone to Bureau of Indian Affairs Highway 41 (BIA 41) in Red Shirt.