| Mount Washington to Mangualde | 4,018.73 mi (6,467.51 km) |
| Mount Washington to Marco de Canavezes | 3,983.51 mi (6,410.84 km) |
| Mount Washington to Marinha Grande | 3,987.61 mi (6,417.43 km) |
| Mount Washington to Massama | 4,000.31 mi (6,437.87 km) |
| Mount Washington to Matosinhos | 3,957.47 mi (6,368.93 km) |
| Mount Washington to Mealhada | 3,992.34 mi (6,425.05 km) |
| Mount Washington to Melgaco | 3,951.55 mi (6,359.41 km) |
| Mount Washington to Melres | 3,975.01 mi (6,397.17 km) |
| Mount Washington to Mira | 3,977.36 mi (6,400.94 km) |
| Mount Washington to Miranda do Corvo | 4,006.18 mi (6,447.32 km) |
| Mount Washington to Mirandela | 4,020.46 mi (6,470.30 km) |
| Mount Washington to Mogadouro | 4,046.73 mi (6,512.59 km) |
| Mount Washington to Moimenta da Beira | 4,014.77 mi (6,461.15 km) |
| Mount Washington to Moita | 4,017.67 mi (6,465.81 km) |
| Mount Washington to Moncao | 3,942.77 mi (6,345.27 km) |
