| Hard to Marco de Canavezes | 980.31 mi (1,577.65 km) |
| Hard to Marinha Grande | 1,070.09 mi (1,722.15 km) |
| Hard to Massama | 1,126.22 mi (1,812.48 km) |
| Hard to Matosinhos | 1,004.53 mi (1,616.63 km) |
| Hard to Mealhada | 1,023.92 mi (1,647.84 km) |
| Hard to Melgaco | 952.54 mi (1,532.96 km) |
| Hard to Melres | 995.61 mi (1,602.28 km) |
| Hard to Mira | 1,034.26 mi (1,664.48 km) |
| Hard to Miranda do Corvo | 1,030.16 mi (1,657.88 km) |
| Hard to Mirandela | 926.70 mi (1,491.38 km) |
| Hard to Mogadouro | 912.13 mi (1,467.93 km) |
| Hard to Moimenta da Beira | 964.53 mi (1,552.25 km) |
| Hard to Moita | 1,118.60 mi (1,800.22 km) |
| Hard to Moncao | 963.56 mi (1,550.69 km) |
| Hard to Montalegre | 941.43 mi (1,515.09 km) |
