| Round Lake to Coudekerque-Branche | 4,055.33 mi (6,526.43 km) |
| Round Lake to Coueron | 4,025.60 mi (6,478.58 km) |
| Round Lake to Coulommiers | 4,160.10 mi (6,695.03 km) |
| Round Lake to Courbevoic | 4,124.91 mi (6,638.40 km) |
| Round Lake to Courcouronnes | 4,141.59 mi (6,665.25 km) |
| Round Lake to Cournon-d'Auvergne | 4,278.33 mi (6,885.31 km) |
| Round Lake to Courrieres | 4,096.12 mi (6,592.07 km) |
| Round Lake to Coutras | 4,168.12 mi (6,707.95 km) |
| Round Lake to Couzeix | 4,193.87 mi (6,749.39 km) |
| Round Lake to Cran-Gevrier | 4,388.37 mi (7,062.40 km) |
| Round Lake to Craponne | 4,339.56 mi (6,983.85 km) |
| Round Lake to Creil | 4,120.96 mi (6,632.05 km) |
| Round Lake to Crepy-en-Valois | 4,137.42 mi (6,658.53 km) |
| Round Lake to Crest | 4,391.08 mi (7,066.77 km) |
| Round Lake to Creteil | 4,136.88 mi (6,657.67 km) |
