| Sierpc to Castelletto sopra Ticino | 700.17 mi (1,126.82 km) |
| Sierpc to Castelli Calepio | 665.82 mi (1,071.54 km) |
| Sierpc to Castelnovo ne' Monti | 719.68 mi (1,158.21 km) |
| Sierpc to Castelnuovo Berardenga | 757.75 mi (1,219.48 km) |
| Sierpc to Castelnuovo di Porto | 813.62 mi (1,309.39 km) |
| Sierpc to Castelnuovo di Verona | 652.19 mi (1,049.60 km) |
| Sierpc to Castelnuovo Rangone | 698.91 mi (1,124.79 km) |
| Sierpc to Castelvetrano | 1,100.85 mi (1,771.65 km) |
| Sierpc to Castelvetro di Modena | 701.44 mi (1,128.85 km) |
| Sierpc to Castenaso | 687.82 mi (1,106.94 km) |
| Sierpc to Castenedolo | 663.30 mi (1,067.48 km) |
| Sierpc to Castiglion Fiorentino | 748.77 mi (1,205.03 km) |
| Sierpc to Castiglione del Lago | 758.84 mi (1,221.23 km) |
| Sierpc to Castiglione delle Stiviere | 661.50 mi (1,064.58 km) |
| Sierpc to Castrolibero | 951.67 mi (1,531.57 km) |
