| Difficult Run to Jicin | 4,322.62 mi (6,956.58 km) |
| Difficult Run to Jihlava | 4,366.79 mi (7,027.66 km) |
| Difficult Run to Jindrichuv Hradec | 4,352.37 mi (7,004.46 km) |
| Difficult Run to Jirkov | 4,246.80 mi (6,834.56 km) |
| Difficult Run to Kadan | 4,243.89 mi (6,829.88 km) |
| Difficult Run to Karlovy Vary | 4,232.92 mi (6,812.23 km) |
| Difficult Run to Karvina | 4,465.13 mi (7,185.93 km) |
| Difficult Run to Kladno | 4,283.54 mi (6,893.69 km) |
| Difficult Run to Klasterec nad Ohri | 4,239.71 mi (6,823.15 km) |
| Difficult Run to Klatovy | 4,276.47 mi (6,882.31 km) |
| Difficult Run to Kolin | 4,330.41 mi (6,969.13 km) |
| Difficult Run to Koprivnice | 4,458.94 mi (7,175.97 km) |
| Difficult Run to Kralupy nad Vltavou | 4,288.80 mi (6,902.16 km) |
| Difficult Run to Kraluv Dvur | 4,287.52 mi (6,900.10 km) |
| Difficult Run to Krnov | 4,424.53 mi (7,120.60 km) |
