| Boulder to Cermik | 6,592.76 mi (10,610.03 km) |
| Boulder to Cesme | 6,217.25 mi (10,005.69 km) |
| Boulder to Ceyhan | 6,568.15 mi (10,570.42 km) |
| Boulder to Ceylanpinar | 6,687.27 mi (10,762.12 km) |
| Boulder to Cicekdagi | 6,375.58 mi (10,260.51 km) |
| Boulder to Cide | 6,202.15 mi (9,981.39 km) |
| Boulder to Cifteler | 6,296.73 mi (10,133.61 km) |
| Boulder to Ciftlik | 6,463.98 mi (10,402.78 km) |
| Boulder to Ciftlikkoy | 6,173.54 mi (9,935.35 km) |
| Boulder to Cihanbeyli | 6,392.26 mi (10,287.34 km) |
| Boulder to Cildir | 6,488.52 mi (10,442.27 km) |
| Boulder to Cilimli | 6,208.10 mi (9,990.97 km) |
| Boulder to Cinar | 6,641.48 mi (10,688.43 km) |
| Boulder to Cinarcik | 6,168.76 mi (9,927.66 km) |
| Boulder to Cine | 6,311.96 mi (10,158.12 km) |
