| Rio Grande City to Cocentaina | 5,517.01 mi (8,878.76 km) |
| Rio Grande City to Coin | 5,363.33 mi (8,631.45 km) |
| Rio Grande City to Colindres | 5,241.29 mi (8,435.05 km) |
| Rio Grande City to Collado-Villalba | 5,290.25 mi (8,513.83 km) |
| Rio Grande City to Colmenar Viejo | 5,301.21 mi (8,531.47 km) |
| Rio Grande City to Colmenarejo | 5,291.83 mi (8,516.37 km) |
| Rio Grande City to Conil de la Frontera | 5,306.42 mi (8,539.86 km) |
| Rio Grande City to Consuegra | 5,342.17 mi (8,597.39 km) |
| Rio Grande City to Corbera de Llobregat | 5,547.75 mi (8,928.25 km) |
| Rio Grande City to Cordoba | 5,328.04 mi (8,574.66 km) |
| Rio Grande City to Coria del Rio | 5,280.56 mi (8,498.23 km) |
| Rio Grande City to Crevillente | 5,513.95 mi (8,873.85 km) |
| Rio Grande City to Cuarte de Huerva | 5,410.15 mi (8,706.79 km) |
| Rio Grande City to Cubellas | 5,542.22 mi (8,919.35 km) |
| Rio Grande City to Cuellar | 5,254.72 mi (8,456.65 km) |
