| Difficult Run to Mancha Real | 3,879.49 mi (6,243.44 km) |
| Difficult Run to Manilva | 3,840.92 mi (6,181.36 km) |
| Difficult Run to Manises | 3,981.44 mi (6,407.50 km) |
| Difficult Run to Manlleu | 4,033.59 mi (6,491.44 km) |
| Difficult Run to Manresa | 4,020.84 mi (6,470.91 km) |
| Difficult Run to Manzanares | 3,855.09 mi (6,204.17 km) |
| Difficult Run to Manzanares el Real | 3,781.76 mi (6,086.15 km) |
| Difficult Run to Maracena | 3,896.27 mi (6,270.45 km) |
| Difficult Run to Marbella | 3,855.14 mi (6,204.25 km) |
| Difficult Run to Marchena | 3,804.02 mi (6,121.98 km) |
| Difficult Run to Marin | 3,506.67 mi (5,643.44 km) |
| Difficult Run to Marratxi | 4,128.75 mi (6,644.58 km) |
| Difficult Run to Martorell | 4,033.18 mi (6,490.77 km) |
| Difficult Run to Martos | 3,864.18 mi (6,218.79 km) |
| Difficult Run to Masamagrell | 3,984.52 mi (6,412.47 km) |
