| Sierre to Cocentaina | 660.60 mi (1,063.14 km) |
| Sierre to Coin | 918.36 mi (1,477.96 km) |
| Sierre to Colindres | 573.53 mi (923.00 km) |
| Sierre to Collado-Villalba | 697.65 mi (1,122.77 km) |
| Sierre to Colmenar Viejo | 686.56 mi (1,104.92 km) |
| Sierre to Colmenarejo | 701.10 mi (1,128.31 km) |
| Sierre to Conil de la Frontera | 987.49 mi (1,589.21 km) |
| Sierre to Consuegra | 734.50 mi (1,182.07 km) |
| Sierre to Corbera de Llobregat | 437.62 mi (704.29 km) |
| Sierre to Cordoba | 856.43 mi (1,378.29 km) |
| Sierre to Coria del Rio | 934.50 mi (1,503.93 km) |
| Sierre to Crevillente | 700.12 mi (1,126.74 km) |
| Sierre to Cuarte de Huerva | 531.42 mi (855.23 km) |
| Sierre to Cubellas | 457.12 mi (735.66 km) |
| Sierre to Cuellar | 679.43 mi (1,093.44 km) |
