| Gourock to Castelfidardo | 1,183.51 mi (1,904.68 km) |
| Gourock to Castelfiorentino | 1,101.23 mi (1,772.26 km) |
| Gourock to Castelfranco di Sopra | 1,116.48 mi (1,796.81 km) |
| Gourock to Castelfranco di Sotto | 1,089.48 mi (1,753.35 km) |
| Gourock to Castelfranco Emilia | 1,047.09 mi (1,685.12 km) |
| Gourock to Castelfranco Veneto | 1,014.79 mi (1,633.15 km) |
| Gourock to Castellabate | 1,405.49 mi (2,261.92 km) |
| Gourock to Castellammare del Golfo | 1,483.80 mi (2,387.95 km) |
| Gourock to Castellammare di Stabia | 1,367.87 mi (2,201.38 km) |
| Gourock to Castellamonte | 910.61 mi (1,465.49 km) |
| Gourock to Castellana Grotte | 1,437.10 mi (2,312.79 km) |
| Gourock to Castellaneta | 1,443.94 mi (2,323.80 km) |
| Gourock to Castellanza | 928.85 mi (1,494.85 km) |
| Gourock to Castellarano | 1,041.05 mi (1,675.40 km) |
| Gourock to Castelleone | 971.01 mi (1,562.68 km) |
