| Clay to Carmona | 4,410.17 mi (7,097.48 km) |
| Clay to Cartagena | 4,637.75 mi (7,463.74 km) |
| Clay to Cartama | 4,481.92 mi (7,212.96 km) |
| Clay to Cartaya | 4,338.78 mi (6,982.60 km) |
| Clay to Caspe | 4,576.17 mi (7,364.63 km) |
| Clay to Cassa de la Selva | 4,692.37 mi (7,551.64 km) |
| Clay to Castalla | 4,623.16 mi (7,440.26 km) |
| Clay to Castellbisbal | 4,663.47 mi (7,505.13 km) |
| Clay to Castelldefels | 4,669.13 mi (7,514.24 km) |
| Clay to Castello de Ampurias | 4,690.39 mi (7,548.45 km) |
| Clay to Castellon de la Plana | 4,612.80 mi (7,423.59 km) |
| Clay to Castilleja de la Cuesta | 4,391.53 mi (7,067.49 km) |
| Clay to Catarroja | 4,612.13 mi (7,422.51 km) |
| Clay to Catral | 4,629.67 mi (7,450.73 km) |
| Clay to Caudete | 4,604.51 mi (7,410.24 km) |
