| Potomac Park to Cortona | 6,188.35 mi (9,959.19 km) |
| Potomac Park to Cosenza | 6,540.69 mi (10,526.22 km) |
| Potomac Park to Cossato | 5,946.43 mi (9,569.86 km) |
| Potomac Park to Costa Volpino | 5,992.43 mi (9,643.89 km) |
| Potomac Park to Creazzo | 6,050.36 mi (9,737.12 km) |
| Potomac Park to Crema | 6,004.38 mi (9,663.12 km) |
| Potomac Park to Cremona | 6,027.65 mi (9,700.57 km) |
| Potomac Park to Crevalcore | 6,084.40 mi (9,791.90 km) |
| Potomac Park to Crispiano | 6,496.71 mi (10,455.44 km) |
| Potomac Park to Crosia | 6,541.42 mi (10,527.40 km) |
| Potomac Park to Crotone | 6,579.53 mi (10,588.73 km) |
| Potomac Park to Cuneo | 5,988.56 mi (9,637.66 km) |
| Potomac Park to Cuorgne | 5,939.31 mi (9,558.40 km) |
| Potomac Park to Cusano Milanino | 5,979.14 mi (9,622.49 km) |
| Potomac Park to Cutro | 6,578.30 mi (10,586.75 km) |
