| Difficult Run to Belvedere Marittimo | 4,731.51 mi (7,614.63 km) |
| Difficult Run to Benevento | 4,626.77 mi (7,446.07 km) |
| Difficult Run to Bergamo | 4,246.83 mi (6,834.62 km) |
| Difficult Run to Bernalda | 4,737.13 mi (7,623.68 km) |
| Difficult Run to Bertinoro | 4,403.85 mi (7,087.32 km) |
| Difficult Run to Besana in Brianza | 4,230.15 mi (6,807.77 km) |
| Difficult Run to Besozzo | 4,199.00 mi (6,757.63 km) |
| Difficult Run to Biancavilla | 4,761.39 mi (7,662.71 km) |
| Difficult Run to Biassono | 4,231.57 mi (6,810.06 km) |
| Difficult Run to Bibbiano | 4,314.64 mi (6,943.74 km) |
| Difficult Run to Bibbiena | 4,405.64 mi (7,090.20 km) |
| Difficult Run to Biella | 4,182.14 mi (6,730.50 km) |
| Difficult Run to Bisceglie | 4,698.00 mi (7,560.70 km) |
| Difficult Run to Bisignano | 4,753.83 mi (7,650.55 km) |
| Difficult Run to Bitetto | 4,716.59 mi (7,590.62 km) |
