Place:Keystone, Pennington, South Dakota, United States

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NameKeystone
TypeTown
Coordinates43.894°N 103.426°W
Located inPennington, South Dakota, United States
source: Getty Thesaurus of Geographic Names
source: Family History Library Catalog


the text in this section is copied from an article in Wikipedia

Keystone is a town in the Black Hills region of Pennington County, South Dakota, United States. The population was 240 at the 2020 census. 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 city limits. Keystone was heavily damaged in the 1972 Black Hills flood.

The town took its name from a local mine, which most likely was named after the keystone Masonic symbol.

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