| Spring Creek to Mangualde | 5,223.82 mi (8,406.93 km) |
| Spring Creek to Marco de Canavezes | 5,182.03 mi (8,339.68 km) |
| Spring Creek to Marinha Grande | 5,216.82 mi (8,395.65 km) |
| Spring Creek to Massama | 5,248.55 mi (8,446.72 km) |
| Spring Creek to Matosinhos | 5,160.59 mi (8,305.16 km) |
| Spring Creek to Mealhada | 5,206.96 mi (8,379.79 km) |
| Spring Creek to Melgaco | 5,134.84 mi (8,263.73 km) |
| Spring Creek to Melres | 5,177.63 mi (8,332.59 km) |
| Spring Creek to Mira | 5,193.51 mi (8,358.14 km) |
| Spring Creek to Miranda do Corvo | 5,224.56 mi (8,408.12 km) |
| Spring Creek to Mirandela | 5,205.59 mi (8,377.58 km) |
| Spring Creek to Mogadouro | 5,230.50 mi (8,417.68 km) |
| Spring Creek to Moimenta da Beira | 5,212.25 mi (8,388.30 km) |
| Spring Creek to Moita | 5,265.20 mi (8,473.53 km) |
| Spring Creek to Moncao | 5,128.60 mi (8,253.68 km) |
