| Martha Lake to Carmona | 5,370.80 mi (8,643.46 km) |
| Martha Lake to Cartagena | 5,516.00 mi (8,877.14 km) |
| Martha Lake to Cartama | 5,445.86 mi (8,764.27 km) |
| Martha Lake to Cartaya | 5,329.22 mi (8,576.55 km) |
| Martha Lake to Caspe | 5,341.42 mi (8,596.18 km) |
| Martha Lake to Cassa de la Selva | 5,390.18 mi (8,674.66 km) |
| Martha Lake to Castalla | 5,469.88 mi (8,802.92 km) |
| Martha Lake to Castellbisbal | 5,387.74 mi (8,670.73 km) |
| Martha Lake to Castelldefels | 5,398.77 mi (8,688.48 km) |
| Martha Lake to Castello de Ampurias | 5,374.85 mi (8,649.98 km) |
| Martha Lake to Castellon de la Plana | 5,411.73 mi (8,709.34 km) |
| Martha Lake to Castilleja de la Cuesta | 5,361.27 mi (8,628.13 km) |
| Martha Lake to Catarroja | 5,432.91 mi (8,743.42 km) |
| Martha Lake to Catral | 5,490.21 mi (8,835.64 km) |
| Martha Lake to Caudete | 5,453.85 mi (8,777.12 km) |
