| Difficult Run to Borsbeek | 3,871.54 mi (6,230.64 km) |
| Difficult Run to Boussu | 3,863.34 mi (6,217.45 km) |
| Difficult Run to Braine-l'Alleud | 3,880.40 mi (6,244.91 km) |
| Difficult Run to Braine-le-Chateau | 3,876.07 mi (6,237.93 km) |
| Difficult Run to Braine-le-Comte | 3,872.80 mi (6,232.67 km) |
| Difficult Run to Brasschaat | 3,869.41 mi (6,227.21 km) |
| Difficult Run to Brecht | 3,873.72 mi (6,234.15 km) |
| Difficult Run to Bredene | 3,809.89 mi (6,131.43 km) |
| Difficult Run to Bree | 3,917.43 mi (6,304.49 km) |
| Difficult Run to Bruges | 3,820.55 mi (6,148.59 km) |
| Difficult Run to Brussels | 3,875.34 mi (6,236.75 km) |
| Difficult Run to Buggenhout | 3,865.24 mi (6,220.50 km) |
| Difficult Run to Chapelle-lez-Herlaimont | 3,882.36 mi (6,248.05 km) |
| Difficult Run to Charleroi | 3,890.21 mi (6,260.68 km) |
| Difficult Run to Chatelet | 3,893.61 mi (6,266.15 km) |
