| Gourock to Castelletto sopra Ticino | 915.84 mi (1,473.90 km) |
| Gourock to Castelli Calepio | 956.10 mi (1,538.69 km) |
| Gourock to Castelnovo ne' Monti | 1,037.77 mi (1,670.13 km) |
| Gourock to Castelnuovo Berardenga | 1,130.74 mi (1,819.75 km) |
| Gourock to Castelnuovo di Porto | 1,228.57 mi (1,977.19 km) |
| Gourock to Castelnuovo di Verona | 992.34 mi (1,597.02 km) |
| Gourock to Castelnuovo Rangone | 1,046.27 mi (1,683.81 km) |
| Gourock to Castelvetrano | 1,502.64 mi (2,418.26 km) |
| Gourock to Castelvetro di Modena | 1,049.56 mi (1,689.11 km) |
| Gourock to Castenaso | 1,064.05 mi (1,712.42 km) |
| Gourock to Castenedolo | 976.58 mi (1,571.65 km) |
| Gourock to Castiglion Fiorentino | 1,142.65 mi (1,838.92 km) |
| Gourock to Castiglione del Lago | 1,158.02 mi (1,863.65 km) |
| Gourock to Castiglione delle Stiviere | 986.37 mi (1,587.42 km) |
| Gourock to Castrolibero | 1,497.30 mi (2,409.67 km) |
