| Rio Grande City to Cockermouth | 4,957.44 mi (7,978.23 km) |
| Rio Grande City to Colchester | 5,192.58 mi (8,356.65 km) |
| Rio Grande City to Coleford | 5,056.75 mi (8,138.05 km) |
| Rio Grande City to Colne | 5,021.90 mi (8,081.96 km) |
| Rio Grande City to Colwyn Bay | 4,977.26 mi (8,010.13 km) |
| Rio Grande City to Congleton | 5,037.73 mi (8,107.45 km) |
| Rio Grande City to Conisbrough | 5,067.58 mi (8,155.49 km) |
| Rio Grande City to Connahs Quay | 5,003.90 mi (8,052.99 km) |
| Rio Grande City to Consett | 5,010.00 mi (8,062.81 km) |
| Rio Grande City to Conwy | 4,972.46 mi (8,002.40 km) |
| Rio Grande City to Cookstown | 4,829.79 mi (7,772.80 km) |
| Rio Grande City to Corby | 5,113.87 mi (8,229.98 km) |
| Rio Grande City to Corfe Mullen | 5,107.03 mi (8,218.96 km) |
| Rio Grande City to Corsham | 5,083.06 mi (8,180.39 km) |
| Rio Grande City to Coseley | 5,058.46 mi (8,140.80 km) |
