| Difficult Run to Menen | 3,826.66 mi (6,158.41 km) |
| Difficult Run to Merchtem | 3,867.43 mi (6,224.03 km) |
| Difficult Run to Merelbeke | 3,847.04 mi (6,191.21 km) |
| Difficult Run to Merksem | 3,868.76 mi (6,226.17 km) |
| Difficult Run to Merksplas | 3,882.64 mi (6,248.51 km) |
| Difficult Run to Mettet | 3,901.44 mi (6,278.77 km) |
| Difficult Run to Meulebeke | 3,829.53 mi (6,163.03 km) |
| Difficult Run to Middelkerke | 3,804.76 mi (6,123.17 km) |
| Difficult Run to Mol | 3,897.41 mi (6,272.28 km) |
| Difficult Run to Mons | 3,869.19 mi (6,226.86 km) |
| Difficult Run to Montignies-le-Tilleul | 3,888.60 mi (6,258.10 km) |
| Difficult Run to Moorslede | 3,821.89 mi (6,150.74 km) |
| Difficult Run to Moortebeek | 3,874.57 mi (6,235.51 km) |
| Difficult Run to Morlanwelz-Mariemont | 3,880.75 mi (6,245.46 km) |
| Difficult Run to Mortsel | 3,871.73 mi (6,230.94 km) |
