| Boulder to Livermore (California) | 901.42 mi (1,450.70 km) |
| Boulder to Livingston (California) | 852.72 mi (1,372.33 km) |
| Boulder to Livonia (Michigan) | 1,145.73 mi (1,843.87 km) |
| Boulder to Lochearn (Maryland) | 1,510.77 mi (2,431.35 km) |
| Boulder to Lockhart (Florida) | 1,563.28 mi (2,515.86 km) |
| Boulder to Lockhart (Texas) | 820.93 mi (1,321.17 km) |
| Boulder to Lockport (Illinois) | 905.66 mi (1,457.52 km) |
| Boulder to Lockport (New York) | 1,383.31 mi (2,226.22 km) |
| Boulder to Lodi (California) | 869.19 mi (1,398.83 km) |
| Boulder to Lodi (New Jersey) | 1,631.25 mi (2,625.24 km) |
| Boulder to Logan (Utah) | 363.95 mi (585.72 km) |
| Boulder to Logansport (Indiana) | 994.02 mi (1,599.72 km) |
| Boulder to Loganville (Georgia) | 1,250.88 mi (2,013.10 km) |
| Boulder to Loma Linda (California) | 779.05 mi (1,253.76 km) |
| Boulder to Lombard (Illinois) | 906.96 mi (1,459.61 km) |
