| Boulder to Rende | 5,826.95 mi (9,377.57 km) |
| Boulder to Resana | 5,360.67 mi (8,627.16 km) |
| Boulder to Rescaldina | 5,258.77 mi (8,463.17 km) |
| Boulder to Rezzato | 5,310.94 mi (8,547.14 km) |
| Boulder to Rho | 5,265.67 mi (8,474.28 km) |
| Boulder to Ribera | 5,816.08 mi (9,360.08 km) |
| Boulder to Riccione Marina | 5,465.78 mi (8,796.33 km) |
| Boulder to Riesi | 5,857.37 mi (9,426.53 km) |
| Boulder to Rieti | 5,553.04 mi (8,936.75 km) |
| Boulder to Rignano Flaminio | 5,550.21 mi (8,932.20 km) |
| Boulder to Rignano sull'Arno | 5,438.11 mi (8,751.80 km) |
| Boulder to Rimini | 5,460.01 mi (8,787.04 km) |
| Boulder to Rionero in Vulture | 5,726.70 mi (9,216.23 km) |
| Boulder to Riposto | 5,874.99 mi (9,454.88 km) |
| Boulder to Riva del Garda | 5,311.15 mi (8,547.48 km) |
