| Walnut Creek to Carmona | 5,841.12 mi (9,400.37 km) |
| Walnut Creek to Cartagena | 6,011.27 mi (9,674.20 km) |
| Walnut Creek to Cartama | 5,917.09 mi (9,522.64 km) |
| Walnut Creek to Cartaya | 5,790.43 mi (9,318.80 km) |
| Walnut Creek to Caspe | 5,860.02 mi (9,430.80 km) |
| Walnut Creek to Cassa de la Selva | 5,925.27 mi (9,535.80 km) |
| Walnut Creek to Castalla | 5,971.95 mi (9,610.92 km) |
| Walnut Creek to Castellbisbal | 5,916.85 mi (9,522.25 km) |
| Walnut Creek to Castelldefels | 5,926.92 mi (9,538.46 km) |
| Walnut Creek to Castello de Ampurias | 5,912.53 mi (9,515.29 km) |
| Walnut Creek to Castellon de la Plana | 5,924.05 mi (9,533.83 km) |
| Walnut Creek to Castilleja de la Cuesta | 5,828.90 mi (9,380.71 km) |
| Walnut Creek to Catarroja | 5,940.46 mi (9,560.25 km) |
| Walnut Creek to Catral | 5,989.32 mi (9,638.88 km) |
| Walnut Creek to Caudete | 5,954.89 mi (9,583.47 km) |
