| Castle Rock to Cloverly (Maryland) | 1,484.68 mi (2,389.37 km) |
| Castle Rock to Clovis (California) | 824.26 mi (1,326.52 km) |
| Castle Rock to Clovis (New Mexico) | 353.34 mi (568.64 km) |
| Castle Rock to Clute (Texas) | 895.18 mi (1,440.65 km) |
| Castle Rock to Coachella (California) | 738.82 mi (1,189.02 km) |
| Castle Rock to Coalinga (California) | 872.89 mi (1,404.78 km) |
| Castle Rock to Coamo (Puerto Rico) | 2,726.69 mi (4,388.18 km) |
| Castle Rock to Coatesville (Pennsylvania) | 1,537.59 mi (2,474.51 km) |
| Castle Rock to Cockeysville (Maryland) | 1,500.08 mi (2,414.15 km) |
| Castle Rock to Cocoa (Florida) | 1,569.48 mi (2,525.84 km) |
| Castle Rock to Cocoa Beach (Florida) | 1,578.41 mi (2,540.20 km) |
| Castle Rock to Coconut Creek (Florida) | 1,685.39 mi (2,712.38 km) |
| Castle Rock to Coeur d'Alene (Idaho) | 828.10 mi (1,332.70 km) |
| Castle Rock to Cohoes (New York) | 1,629.72 mi (2,622.78 km) |
| Castle Rock to Cold Springs (Nevada) | 805.26 mi (1,295.95 km) |
