| Difficult Run to Flemalle-Haute | 3,926.71 mi (6,319.42 km) |
| Difficult Run to Fleron | 3,935.20 mi (6,333.10 km) |
| Difficult Run to Fleurus | 3,892.10 mi (6,263.74 km) |
| Difficult Run to Florennes | 3,901.09 mi (6,278.19 km) |
| Difficult Run to Fontaine-l'Eveque | 3,885.02 mi (6,252.33 km) |
| Difficult Run to Forest | 3,875.08 mi (6,236.33 km) |
| Difficult Run to Frameries | 3,867.83 mi (6,224.67 km) |
| Difficult Run to Galmaarden | 3,862.17 mi (6,215.57 km) |
| Difficult Run to Ganshoren | 3,873.37 mi (6,233.59 km) |
| Difficult Run to Gavere | 3,845.35 mi (6,188.49 km) |
| Difficult Run to Geel | 3,893.16 mi (6,265.44 km) |
| Difficult Run to Gembloux | 3,896.02 mi (6,270.04 km) |
| Difficult Run to Genappe | 3,885.67 mi (6,253.39 km) |
| Difficult Run to Genk | 3,918.59 mi (6,306.36 km) |
| Difficult Run to Gent | 3,844.69 mi (6,187.43 km) |
