| Spring Lake to Mangualde | 3,795.06 mi (6,107.56 km) |
| Spring Lake to Marco de Canavezes | 3,762.99 mi (6,055.95 km) |
| Spring Lake to Marinha Grande | 3,755.77 mi (6,044.33 km) |
| Spring Lake to Massama | 3,761.18 mi (6,053.03 km) |
| Spring Lake to Matosinhos | 3,735.84 mi (6,012.25 km) |
| Spring Lake to Mealhada | 3,765.76 mi (6,060.41 km) |
| Spring Lake to Melgaco | 3,737.26 mi (6,014.54 km) |
| Spring Lake to Melres | 3,753.19 mi (6,040.17 km) |
| Spring Lake to Mira | 3,750.54 mi (6,035.91 km) |
| Spring Lake to Miranda do Corvo | 3,777.94 mi (6,080.00 km) |
| Spring Lake to Mirandela | 3,803.98 mi (6,121.91 km) |
| Spring Lake to Mogadouro | 3,830.18 mi (6,164.07 km) |
| Spring Lake to Moimenta da Beira | 3,793.96 mi (6,105.78 km) |
| Spring Lake to Moita | 3,778.46 mi (6,080.85 km) |
| Spring Lake to Moncao | 3,727.75 mi (5,999.24 km) |
