Keystone, South Dakota: Small Town Gateway to Mount Rushmore

Keystone is a town (not a city) in Pennington County, South Dakota.

• Population: 333 (2020 census)
• Location: Southern Black Hills, ~3 mi from Mount Rushmore National Memorial.
• Economy: Tourism-driven—hotels, restaurants, gift shops, gold mine tours, 1880 Train.

It serves as the primary lodging and dining base for Mount Rushmore visitors.