| Martha Lake to Mangualde | 5,130.18 mi (8,256.23 km) |
| Martha Lake to Marco de Canavezes | 5,086.39 mi (8,185.76 km) |
| Martha Lake to Marinha Grande | 5,136.21 mi (8,265.93 km) |
| Martha Lake to Massama | 5,177.24 mi (8,331.97 km) |
| Martha Lake to Matosinhos | 5,068.08 mi (8,156.28 km) |
| Martha Lake to Mealhada | 5,118.91 mi (8,238.08 km) |
| Martha Lake to Melgaco | 5,032.99 mi (8,099.82 km) |
| Martha Lake to Melres | 5,084.27 mi (8,182.34 km) |
| Martha Lake to Mira | 5,106.72 mi (8,218.47 km) |
| Martha Lake to Miranda do Corvo | 5,137.91 mi (8,268.66 km) |
| Martha Lake to Mirandela | 5,102.23 mi (8,211.24 km) |
| Martha Lake to Mogadouro | 5,125.58 mi (8,248.83 km) |
| Martha Lake to Moimenta da Beira | 5,115.02 mi (8,231.84 km) |
| Martha Lake to Moita | 5,192.96 mi (8,357.26 km) |
| Martha Lake to Moncao | 5,028.26 mi (8,092.21 km) |
