| Castle Rock to Cockermouth | 4,465.58 mi (7,186.65 km) |
| Castle Rock to Colchester | 4,719.53 mi (7,595.35 km) |
| Castle Rock to Coleford | 4,601.60 mi (7,405.56 km) |
| Castle Rock to Colne | 4,536.26 mi (7,300.41 km) |
| Castle Rock to Colwyn Bay | 4,505.95 mi (7,251.63 km) |
| Castle Rock to Congleton | 4,561.82 mi (7,341.54 km) |
| Castle Rock to Conisbrough | 4,583.00 mi (7,375.62 km) |
| Castle Rock to Connahs Quay | 4,530.85 mi (7,291.70 km) |
| Castle Rock to Consett | 4,509.31 mi (7,257.03 km) |
| Castle Rock to Conwy | 4,501.84 mi (7,245.02 km) |
| Castle Rock to Cookstown | 4,351.32 mi (7,002.77 km) |
| Castle Rock to Corby | 4,640.37 mi (7,467.96 km) |
| Castle Rock to Corfe Mullen | 4,663.23 mi (7,504.74 km) |
| Castle Rock to Corsham | 4,630.87 mi (7,452.66 km) |
| Castle Rock to Coseley | 4,590.39 mi (7,387.51 km) |
