| Middle River to Cocentaina | 3,946.76 mi (6,351.69 km) |
| Middle River to Coin | 3,799.96 mi (6,115.44 km) |
| Middle River to Colindres | 3,670.56 mi (5,907.20 km) |
| Middle River to Collado-Villalba | 3,719.48 mi (5,985.93 km) |
| Middle River to Colmenar Viejo | 3,730.37 mi (6,003.44 km) |
| Middle River to Colmenarejo | 3,721.11 mi (5,988.55 km) |
| Middle River to Conil de la Frontera | 3,745.71 mi (6,028.14 km) |
| Middle River to Consuegra | 3,772.41 mi (6,071.11 km) |
| Middle River to Corbera de Llobregat | 3,976.91 mi (6,400.22 km) |
| Middle River to Cordoba | 3,761.69 mi (6,053.85 km) |
| Middle River to Coria del Rio | 3,716.80 mi (5,981.61 km) |
| Middle River to Crevillente | 3,944.42 mi (6,347.93 km) |
| Middle River to Cuarte de Huerva | 3,838.92 mi (6,178.14 km) |
| Middle River to Cubellas | 3,971.21 mi (6,391.04 km) |
| Middle River to Cuellar | 3,683.57 mi (5,928.14 km) |
