| Difficult Run to Livermore (California) | 2,385.80 mi (3,839.58 km) |
| Difficult Run to Livingston (California) | 2,337.04 mi (3,761.10 km) |
| Difficult Run to Livonia (Michigan) | 397.48 mi (639.68 km) |
| Difficult Run to Lochearn (Maryland) | 45.11 mi (72.60 km) |
| Difficult Run to Lockhart (Florida) | 747.50 mi (1,202.99 km) |
| Difficult Run to Lockhart (Texas) | 1,312.19 mi (2,111.77 km) |
| Difficult Run to Lockport (Illinois) | 592.72 mi (953.89 km) |
| Difficult Run to Lockport (New York) | 303.15 mi (487.87 km) |
| Difficult Run to Lodi (California) | 2,353.13 mi (3,786.99 km) |
| Difficult Run to Lodi (New Jersey) | 220.49 mi (354.84 km) |
| Difficult Run to Logan (Utah) | 1,815.49 mi (2,921.75 km) |
| Difficult Run to Logansport (Indiana) | 494.31 mi (795.51 km) |
| Difficult Run to Loganville (Georgia) | 504.97 mi (812.68 km) |
| Difficult Run to Loma Linda (California) | 2,224.38 mi (3,579.80 km) |
| Difficult Run to Lombard (Illinois) | 597.33 mi (961.31 km) |
