| Boulder to Cavdir | 6,387.60 mi (10,279.85 km) |
| Boulder to Cay | 6,342.73 mi (10,207.65 km) |
| Boulder to Caybasi | 6,357.61 mi (10,231.58 km) |
| Boulder to Caycuma | 6,205.07 mi (9,986.09 km) |
| Boulder to Cayeli | 6,438.93 mi (10,362.46 km) |
| Boulder to Cayiralan | 6,426.06 mi (10,341.75 km) |
| Boulder to Cayirhan | 6,272.61 mi (10,094.79 km) |
| Boulder to Cayirli | 6,503.15 mi (10,465.81 km) |
| Boulder to Cayirova | 6,165.36 mi (9,922.19 km) |
| Boulder to Caykara | 6,449.30 mi (10,379.15 km) |
| Boulder to Cekerek | 6,375.78 mi (10,260.82 km) |
| Boulder to Cekme | 6,147.60 mi (9,893.61 km) |
| Boulder to Celtik | 6,338.96 mi (10,201.58 km) |
| Boulder to Cerkes | 6,263.21 mi (10,079.66 km) |
| Boulder to Cerkezkoy | 6,099.54 mi (9,816.26 km) |
