| Lake Monticello to Mangualde | 3,674.73 mi (5,913.90 km) |
| Lake Monticello to Marco de Canavezes | 3,641.22 mi (5,859.98 km) |
| Lake Monticello to Marinha Grande | 3,639.09 mi (5,856.55 km) |
| Lake Monticello to Massama | 3,647.93 mi (5,870.78 km) |
| Lake Monticello to Matosinhos | 3,614.52 mi (5,817.00 km) |
| Lake Monticello to Mealhada | 3,646.70 mi (5,868.79 km) |
| Lake Monticello to Melgaco | 3,612.75 mi (5,814.15 km) |
| Lake Monticello to Melres | 3,631.98 mi (5,845.11 km) |
| Lake Monticello to Mira | 3,631.56 mi (5,844.43 km) |
| Lake Monticello to Miranda do Corvo | 3,659.64 mi (5,889.62 km) |
| Lake Monticello to Mirandela | 3,680.50 mi (5,923.19 km) |
| Lake Monticello to Mogadouro | 3,706.77 mi (5,965.47 km) |
| Lake Monticello to Moimenta da Beira | 3,672.36 mi (5,910.09 km) |
| Lake Monticello to Moita | 3,665.27 mi (5,898.69 km) |
| Lake Monticello to Moncao | 3,603.54 mi (5,799.33 km) |
