| Castle Rock to Redondela | 4,740.55 mi (7,629.17 km) |
| Castle Rock to Reinosa | 4,897.24 mi (7,881.35 km) |
| Castle Rock to Requena | 5,170.60 mi (8,321.28 km) |
| Castle Rock to Reus | 5,187.62 mi (8,348.66 km) |
| Castle Rock to Rianxo | 4,717.85 mi (7,592.65 km) |
| Castle Rock to Ribadeo | 4,757.18 mi (7,655.94 km) |
| Castle Rock to Rincon de la Victoria | 5,154.09 mi (8,294.70 km) |
| Castle Rock to Ripoll | 5,184.06 mi (8,342.93 km) |
| Castle Rock to Ripollet | 5,214.14 mi (8,391.34 km) |
| Castle Rock to Rojales | 5,247.37 mi (8,444.83 km) |
| Castle Rock to Ronda | 5,114.64 mi (8,231.22 km) |
| Castle Rock to Roquetas de Mar | 5,224.49 mi (8,408.00 km) |
| Castle Rock to Rosas | 5,219.66 mi (8,400.24 km) |
| Castle Rock to Rubi | 5,209.36 mi (8,383.65 km) |
| Castle Rock to Rute | 5,124.99 mi (8,247.88 km) |
