| Difficult Run to Laguna Beach (California) | 2,264.11 mi (3,643.73 km) |
| Difficult Run to Laguna Hills (California) | 2,259.61 mi (3,636.50 km) |
| Difficult Run to Laguna Niguel (California) | 2,261.54 mi (3,639.59 km) |
| Difficult Run to Laguna Woods (California) | 2,260.82 mi (3,638.43 km) |
| Difficult Run to Lahaina (Hawaii) | 4,766.10 mi (7,670.29 km) |
| Difficult Run to Lake Arbor (Maryland) | 27.79 mi (44.72 km) |
| Difficult Run to Lake Barcroft (Virginia) | 10.75 mi (17.30 km) |
| Difficult Run to Lake Butler (Florida) | 758.79 mi (1,221.15 km) |
| Difficult Run to Lake Charles (Louisiana) | 1,082.08 mi (1,741.43 km) |
| Difficult Run to Lake City (Florida) | 672.92 mi (1,082.96 km) |
| Difficult Run to Lake Elmo (Minnesota) | 901.35 mi (1,450.58 km) |
| Difficult Run to Lake Elsinore (California) | 2,237.73 mi (3,601.28 km) |
| Difficult Run to Lake Forest (California) | 2,256.42 mi (3,631.35 km) |
| Difficult Run to Lake Forest (Illinois) | 597.43 mi (961.47 km) |
| Difficult Run to Lake Forest Park (Washington) | 2,304.93 mi (3,709.43 km) |
