| Castricum to Marco de Canavezes | 988.55 mi (1,590.91 km) |
| Castricum to Marinha Grande | 1,094.25 mi (1,761.02 km) |
| Castricum to Massama | 1,162.48 mi (1,870.83 km) |
| Castricum to Matosinhos | 1,004.36 mi (1,616.37 km) |
| Castricum to Mealhada | 1,043.59 mi (1,679.50 km) |
| Castricum to Melgaco | 938.62 mi (1,510.56 km) |
| Castricum to Melres | 1,002.41 mi (1,613.22 km) |
| Castricum to Mira | 1,048.63 mi (1,687.60 km) |
| Castricum to Miranda do Corvo | 1,057.04 mi (1,701.14 km) |
| Castricum to Mirandela | 943.95 mi (1,519.15 km) |
| Castricum to Mogadouro | 940.41 mi (1,513.45 km) |
| Castricum to Moimenta da Beira | 985.47 mi (1,585.96 km) |
| Castricum to Moita | 1,160.99 mi (1,868.43 km) |
| Castricum to Moncao | 947.41 mi (1,524.71 km) |
| Castricum to Montalegre | 941.44 mi (1,515.11 km) |
