Keystone, South Dakota

Keystone is a town in the Black Hills region of Pennington County, South Dakota, United States. The population was 337 at the 2010 census. It is known for being the location of Mount Rushmore National Memorial, which is located just beyond city limits.

Town
Location in Pennington County and the state of South Dakota
Coordinates: 43°53′37″N 103°25′34″W
Country	United States
State	South Dakota
County	Pennington
Area
• Total	2.86 sq mi (7.41 km2)
• Land	2.86 sq mi (7.41 km2)
• Water	0 sq mi (0 km2)
Elevation	4,331 ft (1,320 m)
Population  (2010)
• Total	337
• Estimate  (2012)	342
• Density	117.8/sq mi (45.5/km2)
Time zone	UTC-7 (Mountain (MST))
• Summer (DST)	UTC-6 (MDT)
ZIP code	57751
FIPS code	46-33820
GNIS feature ID	1261912

Keystone, South Dakota Media

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  Mount Rushmore National Memorial, a granite sculpture by Gutzon Borglum, located near Keystone, South Dakota, United States. The sculture comprises the heads of former US Presidents (from left to right) George Washington, Thomas Jefferson, Theodore Roosevelt, and Abraham Lincoln.

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  The National Presidential Wax Museum, a private museum in Keystone

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  Black Hills Central Railroad

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  Keystone Wye just north of the town

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  Identification card of griphite mineral

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  Large crystals of Spodumene in granite dike.* * Etta Mines, near Keystone — Black Hills, Pennington County, South Dakota. 1908. * Plate 7 in U.S.Geological Survey. Folio 219. 1925.

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  Keystone schools from 1895 and 1899, now a museum