| Castle Rock to Crest Hill (Illinois) | 891.41 mi (1,434.58 km) |
| Castle Rock to Crestview (Florida) | 1,189.80 mi (1,914.80 km) |
| Castle Rock to Crestwood (Illinois) | 910.98 mi (1,466.09 km) |
| Castle Rock to Crestwood (Missouri) | 778.84 mi (1,253.42 km) |
| Castle Rock to Creve Coeur (Missouri) | 774.32 mi (1,246.15 km) |
| Castle Rock to Crofton (Maryland) | 1,502.66 mi (2,418.29 km) |
| Castle Rock to Crossville (Tennessee) | 1,107.34 mi (1,782.09 km) |
| Castle Rock to Crowley (Louisiana) | 947.86 mi (1,525.44 km) |
| Castle Rock to Crowley (Texas) | 628.99 mi (1,012.27 km) |
| Castle Rock to Crown Point (Indiana) | 930.33 mi (1,497.22 km) |
| Castle Rock to Crystal (Minnesota) | 705.35 mi (1,135.16 km) |
| Castle Rock to Crystal Lake (Illinois) | 884.64 mi (1,423.68 km) |
| Castle Rock to Cudahy (California) | 826.81 mi (1,330.62 km) |
| Castle Rock to Cudahy (Wisconsin) | 915.72 mi (1,473.71 km) |
| Castle Rock to Cullman (Alabama) | 1,057.35 mi (1,701.64 km) |
