| Castle Rock to Carlsbad (California) | 815.08 mi (1,311.75 km) |
| Castle Rock to Carlsbad (New Mexico) | 483.17 mi (777.59 km) |
| Castle Rock to Carmel (Indiana) | 993.93 mi (1,599.57 km) |
| Castle Rock to Carmichael (California) | 884.73 mi (1,423.84 km) |
| Castle Rock to Carney (Maryland) | 1,506.47 mi (2,424.43 km) |
| Castle Rock to Carnot-Moon (Pennsylvania) | 1,303.07 mi (2,097.09 km) |
| Castle Rock to Carol Stream (Illinois) | 892.56 mi (1,436.43 km) |
| Castle Rock to Carolina (Puerto Rico) | 2,731.08 mi (4,395.25 km) |
| Castle Rock to Carolina Forest (South Carolina) | 1,485.00 mi (2,389.87 km) |
| Castle Rock to Carpentersville (Illinois) | 886.00 mi (1,425.89 km) |
| Castle Rock to Carpinteria (California) | 878.74 mi (1,414.20 km) |
| Castle Rock to Carrboro (North Carolina) | 1,424.50 mi (2,292.52 km) |
| Castle Rock to Carroll (Iowa) | 554.77 mi (892.81 km) |
| Castle Rock to Carrollton (Georgia) | 1,166.04 mi (1,876.55 km) |
| Castle Rock to Carrollton (Texas) | 625.19 mi (1,006.15 km) |
