| Difficult Run to Barking | 3,685.25 mi (5,930.83 km) |
| Difficult Run to Barnet | 3,671.57 mi (5,908.82 km) |
| Difficult Run to Barnoldswick | 3,546.14 mi (5,706.97 km) |
| Difficult Run to Barnsley | 3,580.88 mi (5,762.87 km) |
| Difficult Run to Barnstaple | 3,524.45 mi (5,672.05 km) |
| Difficult Run to Barrhead | 3,429.76 mi (5,519.66 km) |
| Difficult Run to Barri | 3,550.78 mi (5,714.42 km) |
| Difficult Run to Barrow in Furness | 3,501.98 mi (5,635.90 km) |
| Difficult Run to Barton upon Humber | 3,618.77 mi (5,823.85 km) |
| Difficult Run to Barton upon Irwell | 3,547.59 mi (5,709.29 km) |
| Difficult Run to Barwell | 3,605.73 mi (5,802.86 km) |
| Difficult Run to Basford | 3,604.53 mi (5,800.94 km) |
| Difficult Run to Basildon | 3,701.02 mi (5,956.21 km) |
| Difficult Run to Basingstoke | 3,643.50 mi (5,863.65 km) |
| Difficult Run to Bath | 3,588.80 mi (5,775.61 km) |
