| Rapid City to Castle Pines (Colorado) | 329.60 mi (530.43 km) |
| Rapid City to Castle Rock (Colorado) | 335.15 mi (539.37 km) |
| Rapid City to Castro Valley (California) | 1,074.65 mi (1,729.48 km) |
| Rapid City to Catalina Foothills (Arizona) | 912.34 mi (1,468.26 km) |
| Rapid City to Cataño (Puerto Rico) | 2,777.65 mi (4,470.20 km) |
| Rapid City to Cathedral City (California) | 1,000.80 mi (1,610.64 km) |
| Rapid City to Catonsville (Maryland) | 1,399.80 mi (2,252.76 km) |
| Rapid City to Cave Spring (Virginia) | 1,300.10 mi (2,092.31 km) |
| Rapid City to Cayce (South Carolina) | 1,374.47 mi (2,211.99 km) |
| Rapid City to Cayey (Puerto Rico) | 2,793.37 mi (4,495.50 km) |
| Rapid City to Cedar City (Utah) | 678.08 mi (1,091.27 km) |
| Rapid City to Cedar Falls (Iowa) | 551.53 mi (887.60 km) |
| Rapid City to Cedar Hill (Texas) | 862.75 mi (1,388.46 km) |
| Rapid City to Cedar Lake (Indiana) | 821.15 mi (1,321.52 km) |
| Rapid City to Cedar Mill (Oregon) | 962.78 mi (1,549.45 km) |
