| Difficult Run to Bradford | 3,565.53 mi (5,738.17 km) |
| Difficult Run to Bradford-on-Avon | 3,593.97 mi (5,783.93 km) |
| Difficult Run to Bradwell | 3,639.01 mi (5,856.42 km) |
| Difficult Run to Braintree | 3,696.78 mi (5,949.39 km) |
| Difficult Run to Bramhall | 3,557.60 mi (5,725.40 km) |
| Difficult Run to Brandon | 3,687.18 mi (5,933.94 km) |
| Difficult Run to Braunstone | 3,611.62 mi (5,812.35 km) |
| Difficult Run to Bredbury | 3,558.42 mi (5,726.73 km) |
| Difficult Run to Brentwood | 3,692.61 mi (5,942.68 km) |
| Difficult Run to Bridgnorth | 3,563.21 mi (5,734.44 km) |
| Difficult Run to Bridgwater | 3,567.80 mi (5,741.83 km) |
| Difficult Run to Bridlington | 3,620.85 mi (5,827.20 km) |
| Difficult Run to Bridport | 3,585.68 mi (5,770.59 km) |
| Difficult Run to Brierley Hill | 3,576.20 mi (5,755.33 km) |
| Difficult Run to Brighouse | 3,565.56 mi (5,738.22 km) |
