| Round Rock to Caldicot | 4,793.68 mi (7,714.68 km) |
| Round Rock to Calne | 4,827.22 mi (7,768.66 km) |
| Round Rock to Cam | 4,805.75 mi (7,734.11 km) |
| Round Rock to Camberley | 4,879.72 mi (7,853.15 km) |
| Round Rock to Camborne | 4,728.30 mi (7,609.46 km) |
| Round Rock to Cambridge | 4,887.51 mi (7,865.68 km) |
| Round Rock to Cambuslang | 4,629.44 mi (7,450.37 km) |
| Round Rock to Canford Cliffs | 4,851.12 mi (7,807.12 km) |
| Round Rock to Cannock | 4,791.35 mi (7,710.93 km) |
| Round Rock to Canterbury | 4,952.32 mi (7,969.99 km) |
| Round Rock to Carlisle | 4,697.69 mi (7,560.19 km) |
| Round Rock to Carlton Colville | 4,939.77 mi (7,949.79 km) |
| Round Rock to Carluke | 4,643.63 mi (7,473.21 km) |
| Round Rock to Carnoustie | 4,664.52 mi (7,506.82 km) |
| Round Rock to Carshalton | 4,901.26 mi (7,887.82 km) |
