| Elk River to Mangualde | 4,136.93 mi (6,657.74 km) |
| Elk River to Marco de Canavezes | 4,097.11 mi (6,593.66 km) |
| Elk River to Marinha Grande | 4,121.29 mi (6,632.57 km) |
| Elk River to Massama | 4,146.81 mi (6,673.64 km) |
| Elk River to Matosinhos | 4,073.77 mi (6,556.10 km) |
| Elk River to Mealhada | 4,116.47 mi (6,624.83 km) |
| Elk River to Melgaco | 4,055.04 mi (6,525.96 km) |
| Elk River to Melres | 4,091.17 mi (6,584.10 km) |
| Elk River to Mira | 4,102.35 mi (6,602.09 km) |
| Elk River to Miranda do Corvo | 4,132.91 mi (6,651.28 km) |
| Elk River to Mirandela | 4,125.86 mi (6,639.93 km) |
| Elk River to Mogadouro | 4,151.55 mi (6,681.27 km) |
| Elk River to Moimenta da Beira | 4,128.02 mi (6,643.40 km) |
| Elk River to Moita | 4,163.85 mi (6,701.07 km) |
| Elk River to Moncao | 4,047.79 mi (6,514.28 km) |
