| Boulder to Caldicot | 4,585.20 mi (7,379.17 km) |
| Boulder to Calne | 4,617.38 mi (7,430.96 km) |
| Boulder to Cam | 4,594.25 mi (7,393.73 km) |
| Boulder to Camberley | 4,665.51 mi (7,508.42 km) |
| Boulder to Camborne | 4,548.19 mi (7,319.60 km) |
| Boulder to Cambridge | 4,659.00 mi (7,497.94 km) |
| Boulder to Cambuslang | 4,373.63 mi (7,038.68 km) |
| Boulder to Canford Cliffs | 4,649.97 mi (7,483.41 km) |
| Boulder to Cannock | 4,566.23 mi (7,348.63 km) |
| Boulder to Canterbury | 4,730.47 mi (7,612.95 km) |
| Boulder to Carlisle | 4,449.00 mi (7,159.98 km) |
| Boulder to Carlton Colville | 4,701.32 mi (7,566.04 km) |
| Boulder to Carluke | 4,387.69 mi (7,061.30 km) |
| Boulder to Carnoustie | 4,394.88 mi (7,072.87 km) |
| Boulder to Carshalton | 4,684.10 mi (7,538.33 km) |
