Beautiful Rushmore Cave 13622 Highway 40 Keystone, SD 57751 Keystone, SD Archaeology Big Thunder Gold Mine 604 Blair Avenue Keystone, SD 57751 Keystone, SD Museums Battle Creek Campground 634 Old Hill City Road PO Box 437 Keystone, SD 57751 Keystone, SD Campgrounds Triple R Ranch Highway 16A Keystone, SD 57751-0124 Keystone, SD Ranches Mount Rushmore/National Park Service Keystone, SD Landmarks