Live Chat I-90 Community Nearby Traffic Keystone Mine (Landuse quary) 2024-06-04 Roadnow Weather | Gas | Restaurants | Hotels | Car Repair | Convenience Stores Cities close to Keystone Mine (Landuse Quary) Hill City, SD 18.78 Rapid City, SD 18.83 Custer, SD 20.97 Interstate highway exits close to Keystone Mine (Landuse Quary) Exit 55, i90 27.34 Exit 57, i90 27.92 Exit 58, i90 28.32 Interstate highways close to Keystone Mine (Landuse Quary) i90 map 27.34 i25 map 198.77 i80 map 297.35 State roads close to Keystone Mine (Landuse Quary) US 16A SD map 0.67 SD 244 map 2.20 US 16 SD map 3.98