| Castro Valley to Coudekerque-Branche | 5,445.53 mi (8,763.73 km) |
| Castro Valley to Coueron | 5,512.14 mi (8,870.93 km) |
| Castro Valley to Coulommiers | 5,580.53 mi (8,980.99 km) |
| Castro Valley to Courbevoic | 5,551.37 mi (8,934.07 km) |
| Castro Valley to Courcouronnes | 5,570.87 mi (8,965.45 km) |
| Castro Valley to Cournon-d'Auvergne | 5,744.84 mi (9,245.43 km) |
| Castro Valley to Courrieres | 5,490.98 mi (8,836.88 km) |
| Castro Valley to Coutras | 5,673.84 mi (9,131.16 km) |
| Castro Valley to Couzeix | 5,675.72 mi (9,134.18 km) |
| Castro Valley to Cran-Gevrier | 5,825.54 mi (9,375.31 km) |
| Castro Valley to Craponne | 5,792.07 mi (9,321.43 km) |
| Castro Valley to Creil | 5,539.60 mi (8,915.13 km) |
| Castro Valley to Crepy-en-Valois | 5,552.87 mi (8,936.48 km) |
| Castro Valley to Crest | 5,855.56 mi (9,423.62 km) |
| Castro Valley to Creteil | 5,563.21 mi (8,953.12 km) |
