| Walnut Creek to Mangualde | 5,608.35 mi (9,025.76 km) |
| Walnut Creek to Marco de Canavezes | 5,566.17 mi (8,957.88 km) |
| Walnut Creek to Marinha Grande | 5,603.35 mi (9,017.72 km) |
| Walnut Creek to Massama | 5,636.45 mi (9,070.99 km) |
| Walnut Creek to Matosinhos | 5,545.20 mi (8,924.13 km) |
| Walnut Creek to Mealhada | 5,592.35 mi (9,000.02 km) |
| Walnut Creek to Melgaco | 5,517.85 mi (8,880.12 km) |
| Walnut Creek to Melres | 5,562.13 mi (8,951.38 km) |
| Walnut Creek to Mira | 5,579.07 mi (8,978.65 km) |
| Walnut Creek to Miranda do Corvo | 5,610.20 mi (9,028.74 km) |
| Walnut Creek to Mirandela | 5,588.45 mi (8,993.74 km) |
| Walnut Creek to Mogadouro | 5,613.13 mi (9,033.46 km) |
| Walnut Creek to Moimenta da Beira | 5,596.17 mi (9,006.16 km) |
| Walnut Creek to Moita | 5,653.00 mi (9,097.63 km) |
| Walnut Creek to Moncao | 5,511.85 mi (8,870.47 km) |
