| Silver Spring to Castelletto sopra Ticino | 4,183.56 mi (6,732.79 km) |
| Silver Spring to Castelli Calepio | 4,240.46 mi (6,824.37 km) |
| Silver Spring to Castelnovo ne' Monti | 4,301.25 mi (6,922.19 km) |
| Silver Spring to Castelnuovo Berardenga | 4,385.87 mi (7,058.37 km) |
| Silver Spring to Castelnuovo di Porto | 4,471.77 mi (7,196.62 km) |
| Silver Spring to Castelnuovo di Verona | 4,283.97 mi (6,894.38 km) |
| Silver Spring to Castelnuovo Rangone | 4,320.39 mi (6,953.00 km) |
| Silver Spring to Castelvetrano | 4,646.47 mi (7,477.77 km) |
| Silver Spring to Castelvetro di Modena | 4,322.79 mi (6,956.85 km) |
| Silver Spring to Castenaso | 4,344.88 mi (6,992.41 km) |
| Silver Spring to Castenedolo | 4,262.70 mi (6,860.14 km) |
| Silver Spring to Castiglion Fiorentino | 4,404.05 mi (7,087.63 km) |
| Silver Spring to Castiglione del Lago | 4,416.77 mi (7,108.10 km) |
| Silver Spring to Castiglione delle Stiviere | 4,273.68 mi (6,877.82 km) |
| Silver Spring to Castrolibero | 4,739.33 mi (7,627.21 km) |
