| Guadarrama to Mangualde | 192.58 mi (309.93 km) |
| Guadarrama to Marco de Canavezes | 214.89 mi (345.83 km) |
| Guadarrama to Marinha Grande | 263.40 mi (423.91 km) |
| Guadarrama to Massama | 305.70 mi (491.97 km) |
| Guadarrama to Matosinhos | 243.25 mi (391.47 km) |
| Guadarrama to Mealhada | 229.88 mi (369.96 km) |
| Guadarrama to Melgaco | 238.38 mi (383.64 km) |
| Guadarrama to Melres | 226.86 mi (365.10 km) |
| Guadarrama to Mira | 244.35 mi (393.25 km) |
| Guadarrama to Miranda do Corvo | 226.83 mi (365.05 km) |
| Guadarrama to Mirandela | 170.57 mi (274.51 km) |
| Guadarrama to Mogadouro | 144.41 mi (232.41 km) |
| Guadarrama to Moimenta da Beira | 185.48 mi (298.51 km) |
| Guadarrama to Moita | 295.41 mi (475.42 km) |
| Guadarrama to Moncao | 247.35 mi (398.06 km) |
