Keystone is a town located in the Black Hills of Pennington County, South Dakota. As of the 2000 census, the town had a total population of 311. 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 Mount Rushmore National Memorial, which is located just next to the town.
Web Sites and Links
Keystone Chamber of CommerceLodging, attractions, and visitor information.
Resource Guide - City of KeystoneHistorical information and facts about the community.