| Difficult Run to Friern Barnet | 3,673.94 mi (5,912.64 km) |
| Difficult Run to Frimley | 3,656.78 mi (5,885.02 km) |
| Difficult Run to Frodsham | 3,536.49 mi (5,691.43 km) |
| Difficult Run to Frome | 3,593.53 mi (5,783.22 km) |
| Difficult Run to Fulham | 3,675.31 mi (5,914.84 km) |
| Difficult Run to Fulwood | 3,582.00 mi (5,764.67 km) |
| Difficult Run to Gainsborough | 3,611.72 mi (5,812.49 km) |
| Difficult Run to Galashiels | 3,492.72 mi (5,620.99 km) |
| Difficult Run to Garforth | 3,579.88 mi (5,761.26 km) |
| Difficult Run to Gateshead | 3,550.10 mi (5,713.34 km) |
| Difficult Run to Giffnock | 3,433.28 mi (5,525.33 km) |
| Difficult Run to Gillingham | 3,599.42 mi (5,792.71 km) |
| Difficult Run to Gillingham | 3,707.86 mi (5,967.23 km) |
| Difficult Run to Glasgow | 3,434.13 mi (5,526.70 km) |
| Difficult Run to Glastonbury | 3,578.94 mi (5,759.75 km) |
