| Difficult Run to Hoyo de Manzanares | 3,783.33 mi (6,088.68 km) |
| Difficult Run to Huelva | 3,730.25 mi (6,003.25 km) |
| Difficult Run to Huercal de Almeria | 3,965.25 mi (6,381.46 km) |
| Difficult Run to Huercal-Overa | 3,974.24 mi (6,395.93 km) |
| Difficult Run to Huesca | 3,904.44 mi (6,283.59 km) |
| Difficult Run to Huetor Vega | 3,901.09 mi (6,278.20 km) |
| Difficult Run to Huetor-Tajar | 3,876.03 mi (6,237.87 km) |
| Difficult Run to Humanes de Madrid | 3,796.72 mi (6,110.23 km) |
| Difficult Run to Ibi | 4,001.70 mi (6,440.12 km) |
| Difficult Run to Ibiza | 4,089.33 mi (6,581.14 km) |
| Difficult Run to Icod de los Vinos | 3,500.24 mi (5,633.09 km) |
| Difficult Run to Igualada | 4,015.54 mi (6,462.38 km) |
| Difficult Run to Illescas | 3,800.36 mi (6,116.08 km) |
| Difficult Run to Inca | 4,134.11 mi (6,653.20 km) |
| Difficult Run to Ingenio | 3,582.16 mi (5,764.93 km) |
