| Ridge to Mangualde | 3,324.69 mi (5,350.56 km) |
| Ridge to Marco de Canavezes | 3,290.54 mi (5,295.62 km) |
| Ridge to Marinha Grande | 3,290.89 mi (5,296.17 km) |
| Ridge to Massama | 3,301.58 mi (5,313.38 km) |
| Ridge to Matosinhos | 3,264.06 mi (5,253.00 km) |
| Ridge to Mealhada | 3,297.28 mi (5,306.46 km) |
| Ridge to Melgaco | 3,260.91 mi (5,247.93 km) |
| Ridge to Melres | 3,281.56 mi (5,281.17 km) |
| Ridge to Mira | 3,282.20 mi (5,282.19 km) |
| Ridge to Miranda do Corvo | 3,310.60 mi (5,327.89 km) |
| Ridge to Mirandela | 3,329.05 mi (5,357.60 km) |
| Ridge to Mogadouro | 3,355.34 mi (5,399.89 km) |
| Ridge to Moimenta da Beira | 3,321.74 mi (5,345.82 km) |
| Ridge to Moita | 3,318.94 mi (5,341.32 km) |
| Ridge to Moncao | 3,251.83 mi (5,233.31 km) |
