| Difficult Run to Kidbrooke | 3,684.83 mi (5,930.17 km) |
| Difficult Run to Kidderminster | 3,572.97 mi (5,750.15 km) |
| Difficult Run to Kidlington | 3,623.35 mi (5,831.21 km) |
| Difficult Run to Kidsgrove | 3,559.41 mi (5,728.32 km) |
| Difficult Run to Killamarsh | 3,592.06 mi (5,780.87 km) |
| Difficult Run to Killingworth | 3,550.32 mi (5,713.69 km) |
| Difficult Run to Kilmarnock | 3,428.54 mi (5,517.71 km) |
| Difficult Run to Kilsyth | 3,439.53 mi (5,535.39 km) |
| Difficult Run to Kilwinning | 3,419.99 mi (5,503.95 km) |
| Difficult Run to King's Lynn | 3,671.52 mi (5,908.74 km) |
| Difficult Run to Kings Norton | 3,585.59 mi (5,770.46 km) |
| Difficult Run to Kingsnorth | 3,726.69 mi (5,997.53 km) |
| Difficult Run to Kingsteignton | 3,554.51 mi (5,720.43 km) |
| Difficult Run to Kingston upon Hull | 3,622.14 mi (5,829.27 km) |
| Difficult Run to Kingston upon Thames | 3,672.65 mi (5,910.55 km) |
