| Boulder to Racale | 5,859.90 mi (9,430.60 km) |
| Boulder to Racconigi | 5,254.74 mi (8,456.68 km) |
| Boulder to Raffadali | 5,830.87 mi (9,383.88 km) |
| Boulder to Ragusa | 5,899.62 mi (9,494.52 km) |
| Boulder to Ramacca | 5,874.87 mi (9,454.69 km) |
| Boulder to Randazzo | 5,858.18 mi (9,427.82 km) |
| Boulder to Rapallo | 5,329.69 mi (8,577.31 km) |
| Boulder to Ravanusa | 5,853.98 mi (9,421.06 km) |
| Boulder to Ravenna | 5,429.66 mi (8,738.20 km) |
| Boulder to Recanati | 5,526.78 mi (8,894.50 km) |
| Boulder to Recco | 5,325.94 mi (8,571.28 km) |
| Boulder to Reggello | 5,442.99 mi (8,759.65 km) |
| Boulder to Reggio di Calabria | 5,871.44 mi (9,449.18 km) |
| Boulder to Reggio Emilia | 5,361.64 mi (8,628.73 km) |
| Boulder to Reggiolo | 5,357.36 mi (8,621.84 km) |
