| Boulder to Radauti | 5,668.75 mi (9,122.97 km) |
| Boulder to Ramnicu Sarat | 5,839.06 mi (9,397.05 km) |
| Boulder to Ramnicu Valcea | 5,778.62 mi (9,299.80 km) |
| Boulder to Rasnov | 5,782.34 mi (9,305.78 km) |
| Boulder to Reghin | 5,695.11 mi (9,165.39 km) |
| Boulder to Resita | 5,694.64 mi (9,164.63 km) |
| Boulder to Roman | 5,747.53 mi (9,249.75 km) |
| Boulder to Rosiori de Vede | 5,851.98 mi (9,417.86 km) |
| Boulder to Rovinari | 5,753.76 mi (9,259.79 km) |
| Boulder to Roznov | 5,741.54 mi (9,240.12 km) |
| Boulder to Sabaoani | 5,740.45 mi (9,238.37 km) |
| Boulder to Sacele | 5,787.87 mi (9,314.68 km) |
| Boulder to Sacueni | 5,588.93 mi (8,994.51 km) |
| Boulder to Salcea | 5,691.73 mi (9,159.96 km) |
| Boulder to Salonta | 5,606.10 mi (9,022.14 km) |
