| Difficult Run to Ittiri | 4,367.12 mi (7,028.21 km) |
| Difficult Run to Ivrea | 4,176.97 mi (6,722.18 km) |
| Difficult Run to L'Aquila | 4,521.89 mi (7,277.29 km) |
| Difficult Run to La Loggia | 4,183.97 mi (6,733.45 km) |
| Difficult Run to La Maddalena | 4,383.87 mi (7,055.15 km) |
| Difficult Run to La Spezia | 4,305.26 mi (6,928.64 km) |
| Difficult Run to Lacchiarella | 4,236.02 mi (6,817.22 km) |
| Difficult Run to Ladispoli | 4,477.69 mi (7,206.15 km) |
| Difficult Run to Lainate | 4,223.70 mi (6,797.39 km) |
| Difficult Run to Laives | 4,293.60 mi (6,909.88 km) |
| Difficult Run to Lana | 4,279.33 mi (6,886.91 km) |
| Difficult Run to Lanciano | 4,568.97 mi (7,353.05 km) |
| Difficult Run to Langhirano | 4,307.67 mi (6,932.52 km) |
| Difficult Run to Lanuvio | 4,514.96 mi (7,266.13 km) |
| Difficult Run to Lariano | 4,519.06 mi (7,272.73 km) |
