| Castle Rock to Clarkston (Georgia) | 1,203.17 mi (1,936.31 km) |
| Castle Rock to Clarksville (Indiana) | 1,027.69 mi (1,653.90 km) |
| Castle Rock to Clarksville (Tennessee) | 971.70 mi (1,563.80 km) |
| Castle Rock to Clawson (Michigan) | 1,149.98 mi (1,850.72 km) |
| Castle Rock to Clay (Alabama) | 1,083.81 mi (1,744.22 km) |
| Castle Rock to Clayton (California) | 925.28 mi (1,489.09 km) |
| Castle Rock to Clayton (Missouri) | 780.51 mi (1,256.11 km) |
| Castle Rock to Clayton (North Carolina) | 1,464.18 mi (2,356.36 km) |
| Castle Rock to Clayton (Ohio) | 1,090.43 mi (1,754.88 km) |
| Castle Rock to Clearfield (Utah) | 396.41 mi (637.96 km) |
| Castle Rock to Clearlake (California) | 951.31 mi (1,530.99 km) |
| Castle Rock to Clearwater (Florida) | 1,488.23 mi (2,395.08 km) |
| Castle Rock to Cleburne (Texas) | 638.79 mi (1,028.03 km) |
| Castle Rock to Clemmons (North Carolina) | 1,353.02 mi (2,177.47 km) |
| Castle Rock to Clemson (South Carolina) | 1,254.70 mi (2,019.25 km) |
