| Boulder to Rhondda | 4,560.75 mi (7,339.82 km) |
| Boulder to Rhosllanerchrugog | 4,518.51 mi (7,271.84 km) |
| Boulder to Rhyl | 4,491.78 mi (7,228.82 km) |
| Boulder to Rhymney | 4,559.82 mi (7,338.32 km) |
| Boulder to Richmond | 4,675.74 mi (7,524.87 km) |
| Boulder to Rickmansworth | 4,662.52 mi (7,503.60 km) |
| Boulder to Ripley | 4,572.87 mi (7,359.33 km) |
| Boulder to Ripon | 4,525.41 mi (7,282.95 km) |
| Boulder to Risca | 4,572.54 mi (7,358.79 km) |
| Boulder to Rochdale | 4,524.98 mi (7,282.26 km) |
| Boulder to Rochester | 4,706.63 mi (7,574.58 km) |
| Boulder to Rock Ferry | 4,505.83 mi (7,251.43 km) |
| Boulder to Rogerstone | 4,574.54 mi (7,362.01 km) |
| Boulder to Romford | 4,687.23 mi (7,543.36 km) |
| Boulder to Romsey | 4,653.43 mi (7,488.97 km) |
