| North Potomac to Castelletto sopra Ticino | 4,189.00 mi (6,741.55 km) |
| North Potomac to Castelli Calepio | 4,245.82 mi (6,832.99 km) |
| North Potomac to Castelnovo ne' Monti | 4,306.82 mi (6,931.16 km) |
| North Potomac to Castelnuovo Berardenga | 4,391.57 mi (7,067.55 km) |
| North Potomac to Castelnuovo di Porto | 4,477.63 mi (7,206.05 km) |
| North Potomac to Castelnuovo di Verona | 4,289.30 mi (6,902.97 km) |
| North Potomac to Castelnuovo Rangone | 4,325.90 mi (6,961.86 km) |
| North Potomac to Castelvetrano | 4,653.15 mi (7,488.52 km) |
| North Potomac to Castelvetro di Modena | 4,328.30 mi (6,965.72 km) |
| North Potomac to Castenaso | 4,350.35 mi (7,001.21 km) |
| North Potomac to Castenedolo | 4,268.06 mi (6,868.78 km) |
| North Potomac to Castiglion Fiorentino | 4,409.72 mi (7,096.76 km) |
| North Potomac to Castiglione del Lago | 4,422.47 mi (7,117.27 km) |
| North Potomac to Castiglione delle Stiviere | 4,279.04 mi (6,886.45 km) |
| North Potomac to Castrolibero | 4,745.39 mi (7,636.97 km) |
