| Castle Rock to Clacton-on-Sea | 4,731.96 mi (7,615.35 km) |
| Castle Rock to Clay Cross | 4,589.17 mi (7,385.55 km) |
| Castle Rock to Clayton | 4,551.33 mi (7,324.65 km) |
| Castle Rock to Clayton le Moors | 4,532.34 mi (7,294.09 km) |
| Castle Rock to Cleckheaton | 4,556.74 mi (7,333.36 km) |
| Castle Rock to Cleethorpes | 4,620.46 mi (7,435.92 km) |
| Castle Rock to Clevedon | 4,607.05 mi (7,414.32 km) |
| Castle Rock to Clifton | 4,607.49 mi (7,415.03 km) |
| Castle Rock to Clifton | 4,567.86 mi (7,351.26 km) |
| Castle Rock to Cliftonville | 4,757.66 mi (7,656.71 km) |
| Castle Rock to Clitheroe | 4,528.37 mi (7,287.70 km) |
| Castle Rock to Clydebank | 4,385.19 mi (7,057.28 km) |
| Castle Rock to Coalville | 4,608.08 mi (7,415.98 km) |
| Castle Rock to Coatbridge | 4,398.85 mi (7,079.26 km) |
| Castle Rock to Cobham | 4,697.38 mi (7,559.70 km) |
