| Difficult Run to Beuvry | 3,815.45 mi (6,140.37 km) |
| Difficult Run to Beziers | 4,035.80 mi (6,494.99 km) |
| Difficult Run to Bezons | 3,836.51 mi (6,174.26 km) |
| Difficult Run to Biarritz | 3,813.71 mi (6,137.57 km) |
| Difficult Run to Biganos | 3,808.82 mi (6,129.71 km) |
| Difficult Run to Billere | 3,872.12 mi (6,231.57 km) |
| Difficult Run to Biot | 4,200.92 mi (6,760.73 km) |
| Difficult Run to Biscarrosse | 3,807.13 mi (6,126.98 km) |
| Difficult Run to Bischheim | 4,076.15 mi (6,559.92 km) |
| Difficult Run to Bischwiller | 4,075.99 mi (6,559.67 km) |
| Difficult Run to Blagnac | 3,944.36 mi (6,347.83 km) |
| Difficult Run to Blain | 3,701.63 mi (5,957.19 km) |
| Difficult Run to Blanquefort | 3,817.10 mi (6,143.03 km) |
| Difficult Run to Blois | 3,833.01 mi (6,168.64 km) |
| Difficult Run to Bobigny | 3,846.26 mi (6,189.95 km) |
