| Fern Down to Mangualde | 759.14 mi (1,221.72 km) |
| Fern Down to Marco de Canavezes | 729.02 mi (1,173.24 km) |
| Fern Down to Marinha Grande | 836.26 mi (1,345.83 km) |
| Fern Down to Massama | 906.83 mi (1,459.41 km) |
| Fern Down to Matosinhos | 740.15 mi (1,191.16 km) |
| Fern Down to Mealhada | 786.17 mi (1,265.23 km) |
| Fern Down to Melgaco | 672.15 mi (1,081.72 km) |
| Fern Down to Melres | 741.41 mi (1,193.19 km) |
| Fern Down to Mira | 788.52 mi (1,269.01 km) |
| Fern Down to Miranda do Corvo | 802.24 mi (1,291.08 km) |
| Fern Down to Mirandela | 691.65 mi (1,113.11 km) |
| Fern Down to Mogadouro | 693.91 mi (1,116.74 km) |
| Fern Down to Moimenta da Beira | 732.12 mi (1,178.24 km) |
| Fern Down to Moita | 908.25 mi (1,461.68 km) |
| Fern Down to Moncao | 679.45 mi (1,093.48 km) |
