| Walnut Creek to Cocentaina | 5,972.75 mi (9,612.22 km) |
| Walnut Creek to Coin | 5,914.64 mi (9,518.69 km) |
| Walnut Creek to Colindres | 5,631.60 mi (9,063.19 km) |
| Walnut Creek to Collado-Villalba | 5,747.63 mi (9,249.92 km) |
| Walnut Creek to Colmenar Viejo | 5,755.28 mi (9,262.22 km) |
| Walnut Creek to Colmenarejo | 5,750.89 mi (9,255.16 km) |
| Walnut Creek to Conil de la Frontera | 5,881.73 mi (9,465.74 km) |
| Walnut Creek to Consuegra | 5,820.35 mi (9,366.94 km) |
| Walnut Creek to Corbera de Llobregat | 5,918.24 mi (9,524.49 km) |
| Walnut Creek to Cordoba | 5,853.72 mi (9,420.66 km) |
| Walnut Creek to Coria del Rio | 5,833.75 mi (9,388.51 km) |
| Walnut Creek to Crevillente | 5,984.64 mi (9,631.34 km) |
| Walnut Creek to Cuarte de Huerva | 5,811.27 mi (9,352.34 km) |
| Walnut Creek to Cubellas | 5,920.22 mi (9,527.68 km) |
| Walnut Creek to Cuellar | 5,698.72 mi (9,171.21 km) |
