| Difficult Run to Brescia | 4,275.38 mi (6,880.56 km) |
| Difficult Run to Bressanone | 4,297.46 mi (6,916.09 km) |
| Difficult Run to Bresso | 4,231.20 mi (6,809.46 km) |
| Difficult Run to Brindisi | 4,783.40 mi (7,698.13 km) |
| Difficult Run to Broni | 4,249.71 mi (6,839.25 km) |
| Difficult Run to Bronte | 4,754.78 mi (7,652.08 km) |
| Difficult Run to Brugherio | 4,235.69 mi (6,816.69 km) |
| Difficult Run to Brugnera | 4,361.26 mi (7,018.77 km) |
| Difficult Run to Bruino | 4,173.38 mi (6,716.41 km) |
| Difficult Run to Brunico | 4,306.38 mi (6,930.45 km) |
| Difficult Run to Brusciano | 4,618.61 mi (7,432.93 km) |
| Difficult Run to Bucine | 4,404.41 mi (7,088.21 km) |
| Difficult Run to Budrio | 4,364.43 mi (7,023.88 km) |
| Difficult Run to Busca | 4,189.11 mi (6,741.72 km) |
| Difficult Run to Bussolengo | 4,304.59 mi (6,927.56 km) |
