| Forest Lake to Mangualde | 4,113.58 mi (6,620.16 km) |
| Forest Lake to Marco de Canavezes | 4,073.87 mi (6,556.27 km) |
| Forest Lake to Marinha Grande | 4,097.48 mi (6,594.25 km) |
| Forest Lake to Massama | 4,122.64 mi (6,634.75 km) |
| Forest Lake to Matosinhos | 4,050.44 mi (6,518.55 km) |
| Forest Lake to Mealhada | 4,092.94 mi (6,586.95 km) |
| Forest Lake to Melgaco | 4,032.09 mi (6,489.02 km) |
| Forest Lake to Melres | 4,067.85 mi (6,546.58 km) |
| Forest Lake to Mira | 4,078.78 mi (6,564.16 km) |
| Forest Lake to Miranda do Corvo | 4,109.31 mi (6,613.29 km) |
| Forest Lake to Mirandela | 4,102.89 mi (6,602.96 km) |
| Forest Lake to Mogadouro | 4,128.60 mi (6,644.35 km) |
| Forest Lake to Moimenta da Beira | 4,104.81 mi (6,606.05 km) |
| Forest Lake to Moita | 4,139.70 mi (6,662.20 km) |
| Forest Lake to Moncao | 4,024.78 mi (6,477.26 km) |
