| Potomac Park to Castelletto sopra Ticino | 5,953.20 mi (9,580.75 km) |
| Potomac Park to Castelli Calepio | 5,996.86 mi (9,651.02 km) |
| Potomac Park to Castelnovo ne' Monti | 6,076.49 mi (9,779.16 km) |
| Potomac Park to Castelnuovo Berardenga | 6,169.42 mi (9,928.72 km) |
| Potomac Park to Castelnuovo di Porto | 6,266.62 mi (10,085.15 km) |
| Potomac Park to Castelnuovo di Verona | 6,034.08 mi (9,710.91 km) |
| Potomac Park to Castelnuovo Rangone | 6,086.73 mi (9,795.65 km) |
| Potomac Park to Castelvetrano | 6,519.64 mi (10,492.35 km) |
| Potomac Park to Castelvetro di Modena | 6,089.94 mi (9,800.81 km) |
| Potomac Park to Castenaso | 6,105.41 mi (9,825.71 km) |
| Potomac Park to Castenedolo | 6,017.74 mi (9,684.61 km) |
| Potomac Park to Castiglion Fiorentino | 6,182.49 mi (9,949.76 km) |
| Potomac Park to Castiglione del Lago | 6,197.66 mi (9,974.17 km) |
| Potomac Park to Castiglione delle Stiviere | 6,027.73 mi (9,700.70 km) |
| Potomac Park to Castrolibero | 6,538.21 mi (10,522.23 km) |
