| River Grove to Montalegre | 3,953.67 mi (6,362.81 km) |
| River Grove to Montemor-o-Novo | 4,044.36 mi (6,508.76 km) |
| River Grove to Montemor-o-Velho | 3,969.83 mi (6,388.83 km) |
| River Grove to Montijo | 4,011.51 mi (6,455.89 km) |
| River Grove to Mortagua | 3,981.20 mi (6,407.11 km) |
| River Grove to Moura | 4,098.36 mi (6,595.68 km) |
| River Grove to Murtosa | 3,952.68 mi (6,361.23 km) |
| River Grove to Nazare | 3,971.79 mi (6,391.99 km) |
| River Grove to Nelas | 3,995.76 mi (6,430.56 km) |
| River Grove to Obidos | 3,975.98 mi (6,398.72 km) |
| River Grove to Odemira | 4,063.04 mi (6,538.84 km) |
| River Grove to Odivelas | 3,994.77 mi (6,428.95 km) |
| River Grove to Oeiras | 3,992.15 mi (6,424.75 km) |
| River Grove to Olhao | 4,120.30 mi (6,630.99 km) |
| River Grove to Oliveira de Azemeis | 3,956.24 mi (6,366.95 km) |
