| Round Rock to Cockermouth | 4,688.21 mi (7,544.95 km) |
| Round Rock to Colchester | 4,926.91 mi (7,929.09 km) |
| Round Rock to Coleford | 4,793.39 mi (7,714.21 km) |
| Round Rock to Colne | 4,753.79 mi (7,650.48 km) |
| Round Rock to Colwyn Bay | 4,711.14 mi (7,581.85 km) |
| Round Rock to Congleton | 4,771.12 mi (7,678.38 km) |
| Round Rock to Conisbrough | 4,799.77 mi (7,724.49 km) |
| Round Rock to Connahs Quay | 4,737.60 mi (7,624.44 km) |
| Round Rock to Consett | 4,739.66 mi (7,627.75 km) |
| Round Rock to Conwy | 4,706.43 mi (7,574.27 km) |
| Round Rock to Cookstown | 4,562.11 mi (7,342.01 km) |
| Round Rock to Corby | 4,847.87 mi (7,801.90 km) |
| Round Rock to Corfe Mullen | 4,845.63 mi (7,798.29 km) |
| Round Rock to Corsham | 4,820.25 mi (7,757.45 km) |
| Round Rock to Coseley | 4,793.10 mi (7,713.76 km) |
