| Boulder to Leopoldsburg | 4,877.77 mi (7,850.00 km) |
| Boulder to Lessines | 4,848.18 mi (7,802.39 km) |
| Boulder to Leuven | 4,869.80 mi (7,837.18 km) |
| Boulder to Lichtervelde | 4,810.72 mi (7,742.10 km) |
| Boulder to Liedekerke | 4,849.94 mi (7,805.23 km) |
| Boulder to Liege | 4,909.66 mi (7,901.33 km) |
| Boulder to Lierre | 4,854.23 mi (7,812.14 km) |
| Boulder to Lille | 4,858.61 mi (7,819.18 km) |
| Boulder to Lint | 4,852.20 mi (7,808.87 km) |
| Boulder to Lochristi | 4,831.28 mi (7,775.19 km) |
| Boulder to Lokeren | 4,836.29 mi (7,783.26 km) |
| Boulder to Lommel | 4,874.55 mi (7,844.83 km) |
| Boulder to Londerzeel | 4,851.28 mi (7,807.38 km) |
| Boulder to Louvain-la-Neuve | 4,872.78 mi (7,841.98 km) |
| Boulder to Lovendegem | 4,823.47 mi (7,762.63 km) |
