| Difficult Run to Aberaman | 3,538.24 mi (5,694.25 km) |
| Difficult Run to Aberbargoed | 3,546.90 mi (5,708.19 km) |
| Difficult Run to Aberdare | 3,537.51 mi (5,693.07 km) |
| Difficult Run to Aberdeen | 3,494.04 mi (5,623.12 km) |
| Difficult Run to Abergavenny | 3,552.90 mi (5,717.83 km) |
| Difficult Run to Abergele | 3,502.71 mi (5,637.06 km) |
| Difficult Run to Abertawe | 3,518.59 mi (5,662.63 km) |
| Difficult Run to Abertillery | 3,550.11 mi (5,713.34 km) |
| Difficult Run to Aberystwyth | 3,498.26 mi (5,629.91 km) |
| Difficult Run to Abingdon | 3,626.96 mi (5,837.02 km) |
| Difficult Run to Abram | 3,537.97 mi (5,693.81 km) |
| Difficult Run to Accrington | 3,542.28 mi (5,700.74 km) |
| Difficult Run to Acomb | 3,586.99 mi (5,772.71 km) |
| Difficult Run to Acton | 3,671.55 mi (5,908.79 km) |
| Difficult Run to Addlestone | 3,665.75 mi (5,899.46 km) |
