| Difficult Run to Juprelle | 3,926.47 mi (6,319.05 km) |
| Difficult Run to Jurbise | 3,866.37 mi (6,222.32 km) |
| Difficult Run to Kalmthout | 3,866.19 mi (6,222.04 km) |
| Difficult Run to Kampenhout | 3,880.87 mi (6,245.65 km) |
| Difficult Run to Kapelle-op-den-Bos | 3,871.54 mi (6,230.64 km) |
| Difficult Run to Kapellen | 3,866.55 mi (6,222.61 km) |
| Difficult Run to Kasterlee | 3,888.99 mi (6,258.73 km) |
| Difficult Run to Keerbergen | 3,882.56 mi (6,248.37 km) |
| Difficult Run to Kinrooi | 3,923.41 mi (6,314.11 km) |
| Difficult Run to Knokke-Heist | 3,819.81 mi (6,147.40 km) |
| Difficult Run to Koekelare | 3,813.60 mi (6,137.39 km) |
| Difficult Run to Koekelberg | 3,874.04 mi (6,234.67 km) |
| Difficult Run to Koksijde | 3,799.97 mi (6,115.46 km) |
| Difficult Run to Kontich | 3,871.91 mi (6,231.24 km) |
| Difficult Run to Kortemark | 3,817.73 mi (6,144.04 km) |
