| Martha Lake to Cividale del Friuli | 5,415.85 mi (8,715.96 km) |
| Martha Lake to Civita Castellana | 5,621.93 mi (9,047.62 km) |
| Martha Lake to Civitanova Marche | 5,593.04 mi (9,001.13 km) |
| Martha Lake to Civitavecchia | 5,618.62 mi (9,042.29 km) |
| Martha Lake to Civitella in Val di Chiana | 5,537.20 mi (8,911.27 km) |
| Martha Lake to Clusone | 5,346.20 mi (8,603.88 km) |
| Martha Lake to Coccaglio | 5,365.93 mi (8,635.63 km) |
| Martha Lake to Codigoro | 5,461.57 mi (8,789.55 km) |
| Martha Lake to Codogno | 5,383.14 mi (8,663.33 km) |
| Martha Lake to Codroipo | 5,413.70 mi (8,712.51 km) |
| Martha Lake to Cogoleto | 5,402.08 mi (8,693.80 km) |
| Martha Lake to Colle di Val d'Elsa | 5,523.77 mi (8,889.65 km) |
| Martha Lake to Colle Salvetti | 5,495.56 mi (8,844.24 km) |
| Martha Lake to Collecchio | 5,420.25 mi (8,723.05 km) |
| Martha Lake to Colleferro | 5,670.99 mi (9,126.58 km) |
