| Castle Rock to Oliveira de Frades | 4,820.66 mi (7,758.10 km) |
| Castle Rock to Oliveira do Bairro | 4,814.99 mi (7,748.98 km) |
| Castle Rock to Oliveira do Hospital | 4,848.68 mi (7,803.19 km) |
| Castle Rock to Ourem | 4,846.55 mi (7,799.77 km) |
| Castle Rock to Ovar | 4,795.43 mi (7,717.50 km) |
| Castle Rock to Pacos de Ferreira | 4,789.62 mi (7,708.16 km) |
| Castle Rock to Palmela | 4,875.22 mi (7,845.92 km) |
| Castle Rock to Paredes | 4,795.10 mi (7,716.97 km) |
| Castle Rock to Paredes de Coura | 4,757.34 mi (7,656.20 km) |
| Castle Rock to Penacova | 4,834.10 mi (7,779.73 km) |
| Castle Rock to Penafiel | 4,796.97 mi (7,719.97 km) |
| Castle Rock to Peniche | 4,823.56 mi (7,762.77 km) |
| Castle Rock to Peso da Regua | 4,820.20 mi (7,757.35 km) |
| Castle Rock to Pinhal Novo | 4,872.04 mi (7,840.78 km) |
| Castle Rock to Pinhel | 4,865.66 mi (7,830.53 km) |
