| Difficult Run to Laindon | 3,698.23 mi (5,951.73 km) |
| Difficult Run to Lambeth | 3,678.25 mi (5,919.57 km) |
| Difficult Run to Lanark | 3,454.90 mi (5,560.12 km) |
| Difficult Run to Lancaster | 3,519.72 mi (5,664.44 km) |
| Difficult Run to Lancing | 3,684.73 mi (5,930.00 km) |
| Difficult Run to Larbert | 3,447.70 mi (5,548.54 km) |
| Difficult Run to Largs | 3,411.59 mi (5,490.43 km) |
| Difficult Run to Larkhall | 3,446.54 mi (5,546.67 km) |
| Difficult Run to Launceston | 3,520.62 mi (5,665.89 km) |
| Difficult Run to Leagrave | 3,655.14 mi (5,882.38 km) |
| Difficult Run to Leatherhead | 3,673.99 mi (5,912.71 km) |
| Difficult Run to Ledbury | 3,572.94 mi (5,750.10 km) |
| Difficult Run to Leeds | 3,573.38 mi (5,750.80 km) |
| Difficult Run to Leek | 3,567.96 mi (5,742.07 km) |
| Difficult Run to Leicester | 3,612.98 mi (5,814.52 km) |
