| Difficult Run to Brie-Comte-Robert | 3,859.15 mi (6,210.70 km) |
| Difficult Run to Brignais | 4,035.12 mi (6,493.89 km) |
| Difficult Run to Brignoles | 4,161.92 mi (6,697.97 km) |
| Difficult Run to Brive-la-Gaillarde | 3,907.64 mi (6,288.73 km) |
| Difficult Run to Bron | 4,040.16 mi (6,502.01 km) |
| Difficult Run to Bruay-sur-l'Escaut | 3,853.73 mi (6,201.99 km) |
| Difficult Run to Bruges | 3,818.97 mi (6,146.04 km) |
| Difficult Run to Brumath | 4,070.88 mi (6,551.44 km) |
| Difficult Run to Brunoy | 3,854.50 mi (6,203.22 km) |
| Difficult Run to Bruz | 3,689.25 mi (5,937.27 km) |
| Difficult Run to Bry-sur-Marne | 3,851.53 mi (6,198.44 km) |
| Difficult Run to Bully-les-Mines | 3,819.23 mi (6,146.46 km) |
| Difficult Run to Bures-sur-Yvette | 3,840.03 mi (6,179.93 km) |
| Difficult Run to Bussy-Saint-Georges | 3,858.92 mi (6,210.33 km) |
| Difficult Run to Buxerolles | 3,816.39 mi (6,141.89 km) |
