| Difficult Run to Leopoldsburg | 3,904.73 mi (6,284.05 km) |
| Difficult Run to Lessines | 3,857.60 mi (6,208.21 km) |
| Difficult Run to Leuven | 3,888.44 mi (6,257.84 km) |
| Difficult Run to Lichtervelde | 3,821.22 mi (6,149.66 km) |
| Difficult Run to Liedekerke | 3,863.92 mi (6,218.38 km) |
| Difficult Run to Liege | 3,930.03 mi (6,324.78 km) |
| Difficult Run to Lierre | 3,876.61 mi (6,238.80 km) |
| Difficult Run to Lille | 3,884.74 mi (6,251.89 km) |
| Difficult Run to Lint | 3,873.68 mi (6,234.08 km) |
| Difficult Run to Lochristi | 3,847.88 mi (6,192.57 km) |
| Difficult Run to Lokeren | 3,853.94 mi (6,202.32 km) |
| Difficult Run to Lommel | 3,904.12 mi (6,283.08 km) |
| Difficult Run to Londerzeel | 3,869.28 mi (6,227.00 km) |
| Difficult Run to Louvain-la-Neuve | 3,885.97 mi (6,253.87 km) |
| Difficult Run to Lovendegem | 3,838.46 mi (6,177.40 km) |
