| Castle Rock to Centralia (Illinois) | 846.23 mi (1,361.88 km) |
| Castle Rock to Centralia (Washington) | 1,042.54 mi (1,677.80 km) |
| Castle Rock to Centreville (Virginia) | 1,464.61 mi (2,357.05 km) |
| Castle Rock to Ceres (California) | 878.65 mi (1,414.05 km) |
| Castle Rock to Cerritos (California) | 824.58 mi (1,327.04 km) |
| Castle Rock to Chalco (Nebraska) | 475.94 mi (765.96 km) |
| Castle Rock to Chalmette (Louisiana) | 1,065.53 mi (1,714.80 km) |
| Castle Rock to Chambersburg (Pennsylvania) | 1,441.71 mi (2,320.21 km) |
| Castle Rock to Chamblee (Georgia) | 1,197.94 mi (1,927.89 km) |
| Castle Rock to Champaign (Illinois) | 881.01 mi (1,417.84 km) |
| Castle Rock to Champlin (Minnesota) | 708.65 mi (1,140.46 km) |
| Castle Rock to Chandler (Arizona) | 573.21 mi (922.48 km) |
| Castle Rock to Chanhassen (Minnesota) | 690.52 mi (1,111.29 km) |
| Castle Rock to Channahon (Illinois) | 883.07 mi (1,421.16 km) |
| Castle Rock to Channelview (Texas) | 862.27 mi (1,387.70 km) |
