| Potomac Park to Cividale del Friuli | 6,076.86 mi (9,779.76 km) |
| Potomac Park to Civita Castellana | 6,254.91 mi (10,066.30 km) |
| Potomac Park to Civitanova Marche | 6,240.35 mi (10,042.87 km) |
| Potomac Park to Civitavecchia | 6,246.40 mi (10,052.60 km) |
| Potomac Park to Civitella in Val di Chiana | 6,172.26 mi (9,933.30 km) |
| Potomac Park to Clusone | 5,985.06 mi (9,632.03 km) |
| Potomac Park to Coccaglio | 6,003.00 mi (9,660.90 km) |
| Potomac Park to Codigoro | 6,107.45 mi (9,828.99 km) |
| Potomac Park to Codogno | 6,016.05 mi (9,681.90 km) |
| Potomac Park to Codroipo | 6,071.25 mi (9,770.73 km) |
| Potomac Park to Cogoleto | 6,023.51 mi (9,693.91 km) |
| Potomac Park to Colle di Val d'Elsa | 6,154.98 mi (9,905.48 km) |
| Potomac Park to Colle Salvetti | 6,123.79 mi (9,855.29 km) |
| Potomac Park to Collecchio | 6,053.83 mi (9,742.69 km) |
| Potomac Park to Colleferro | 6,304.72 mi (10,146.46 km) |
