Keystone is a populated place located in Pennington County, South Dakota. It appears on the Mount Rushmore USGS 7.5-minute topographic quadrangle. The elevation at this location is approximately 4,330.71 feet (1,320.00 m) above sea level.
Pennington County · South Dakota
Keystone is a populated place located in Pennington County, South Dakota. It appears on the Mount Rushmore USGS 7.5-minute topographic quadrangle. The elevation at this location is approximately 4,330.71 feet (1,320.00 m) above sea level.