| Castle Rock to Montalegre | 4,793.44 mi (7,714.30 km) |
| Castle Rock to Montemor-o-Novo | 4,901.90 mi (7,888.85 km) |
| Castle Rock to Montemor-o-Velho | 4,820.96 mi (7,758.58 km) |
| Castle Rock to Montijo | 4,870.56 mi (7,838.41 km) |
| Castle Rock to Mortagua | 4,829.78 mi (7,772.78 km) |
| Castle Rock to Moura | 4,956.47 mi (7,976.67 km) |
| Castle Rock to Murtosa | 4,800.69 mi (7,725.97 km) |
| Castle Rock to Nazare | 4,826.77 mi (7,767.94 km) |
| Castle Rock to Nelas | 4,842.91 mi (7,793.91 km) |
| Castle Rock to Obidos | 4,832.38 mi (7,776.97 km) |
| Castle Rock to Odemira | 4,926.56 mi (7,928.53 km) |
| Castle Rock to Odivelas | 4,853.98 mi (7,811.73 km) |
| Castle Rock to Oeiras | 4,852.21 mi (7,808.87 km) |
| Castle Rock to Olhao | 4,984.42 mi (8,021.65 km) |
| Castle Rock to Oliveira de Azemeis | 4,803.27 mi (7,730.12 km) |
