| Holbrook to Mangualde | 3,336.75 mi (5,369.98 km) |
| Holbrook to Marco de Canavezes | 3,302.64 mi (5,315.09 km) |
| Holbrook to Marinha Grande | 3,302.85 mi (5,315.43 km) |
| Holbrook to Massama | 3,313.45 mi (5,332.49 km) |
| Holbrook to Matosinhos | 3,276.15 mi (5,272.45 km) |
| Holbrook to Mealhada | 3,309.31 mi (5,325.82 km) |
| Holbrook to Melgaco | 3,273.07 mi (5,267.50 km) |
| Holbrook to Melres | 3,293.65 mi (5,300.61 km) |
| Holbrook to Mira | 3,294.23 mi (5,301.55 km) |
| Holbrook to Miranda do Corvo | 3,322.61 mi (5,347.22 km) |
| Holbrook to Mirandela | 3,341.19 mi (5,377.13 km) |
| Holbrook to Mogadouro | 3,367.47 mi (5,419.43 km) |
| Holbrook to Moimenta da Beira | 3,333.83 mi (5,365.28 km) |
| Holbrook to Moita | 3,330.81 mi (5,360.43 km) |
| Holbrook to Moncao | 3,263.98 mi (5,252.87 km) |
