| Difficult Run to Bois-Colombes | 3,838.86 mi (6,178.04 km) |
| Difficult Run to Bois-d'Arcy | 3,831.85 mi (6,166.77 km) |
| Difficult Run to Bois-Guillaume | 3,776.65 mi (6,077.93 km) |
| Difficult Run to Boissy-Saint-Leger | 3,853.36 mi (6,201.39 km) |
| Difficult Run to Bolbec | 3,747.00 mi (6,030.22 km) |
| Difficult Run to Bollene | 4,076.42 mi (6,560.36 km) |
| Difficult Run to Bondoufle | 3,851.47 mi (6,198.34 km) |
| Difficult Run to Bondues | 3,827.84 mi (6,160.32 km) |
| Difficult Run to Bondy | 3,848.29 mi (6,193.22 km) |
| Difficult Run to Bonneuil-sur-Marne | 3,851.80 mi (6,198.88 km) |
| Difficult Run to Bonneville | 4,094.56 mi (6,589.55 km) |
| Difficult Run to Bordeaux | 3,821.59 mi (6,150.25 km) |
| Difficult Run to Borgo | 4,339.72 mi (6,984.10 km) |
| Difficult Run to Bouc-Bel-Air | 4,131.44 mi (6,648.91 km) |
| Difficult Run to Boucau | 3,815.89 mi (6,141.09 km) |
