| Difficult Run to Bargas | 3,796.43 mi (6,109.76 km) |
| Difficult Run to Bayona | 3,506.19 mi (5,642.67 km) |
| Difficult Run to Baza | 3,930.26 mi (6,325.15 km) |
| Difficult Run to Beasain | 3,796.45 mi (6,109.79 km) |
| Difficult Run to Bejar | 3,699.67 mi (5,954.04 km) |
| Difficult Run to Benaguacil | 3,971.57 mi (6,391.62 km) |
| Difficult Run to Benahavis | 3,846.99 mi (6,191.13 km) |
| Difficult Run to Benalmadena | 3,870.84 mi (6,229.52 km) |
| Difficult Run to Benavente | 3,660.67 mi (5,891.28 km) |
| Difficult Run to Benetuser | 3,985.80 mi (6,414.52 km) |
| Difficult Run to Beniajan | 3,997.88 mi (6,433.97 km) |
| Difficult Run to Benicarlo | 3,994.30 mi (6,428.21 km) |
| Difficult Run to Benicasim | 3,988.56 mi (6,418.96 km) |
| Difficult Run to Beniel | 3,999.09 mi (6,435.91 km) |
| Difficult Run to Benifayo | 3,988.55 mi (6,418.95 km) |
