| Boulder to Celano | 5,593.56 mi (9,001.96 km) |
| Boulder to Cento | 5,382.44 mi (8,662.20 km) |
| Boulder to Cepagatti | 5,596.97 mi (9,007.45 km) |
| Boulder to Ceprano | 5,619.33 mi (9,043.44 km) |
| Boulder to Cercola | 5,683.40 mi (9,146.55 km) |
| Boulder to Cerea | 5,357.17 mi (8,621.54 km) |
| Boulder to Cerese | 5,348.53 mi (8,607.63 km) |
| Boulder to Cerignola | 5,716.59 mi (9,199.97 km) |
| Boulder to Cermenate | 5,259.40 mi (8,464.19 km) |
| Boulder to Cernusco sul Naviglio | 5,276.89 mi (8,492.34 km) |
| Boulder to Cerreto Guidi | 5,416.17 mi (8,716.49 km) |
| Boulder to Cerro Maggiore | 5,259.57 mi (8,464.46 km) |
| Boulder to Certaldo | 5,432.49 mi (8,742.74 km) |
| Boulder to Cerveteri | 5,546.69 mi (8,926.54 km) |
| Boulder to Cervia | 5,442.79 mi (8,759.32 km) |
