| Boulder to Lewiston (Maine) | 1,807.61 mi (2,909.07 km) |
| Boulder to Lewisville (North Carolina) | 1,373.22 mi (2,209.99 km) |
| Boulder to Lewisville (Texas) | 665.25 mi (1,070.62 km) |
| Boulder to Lexington (Kentucky) | 1,121.78 mi (1,805.33 km) |
| Boulder to Lexington (Nebraska) | 294.30 mi (473.64 km) |
| Boulder to Lexington (North Carolina) | 1,387.93 mi (2,233.65 km) |
| Boulder to Lexington (South Carolina) | 1,385.04 mi (2,229.00 km) |
| Boulder to Lexington Park (Maryland) | 1,542.04 mi (2,481.68 km) |
| Boulder to Liberal (Kansas) | 311.26 mi (500.92 km) |
| Boulder to Liberty (Missouri) | 578.65 mi (931.25 km) |
| Boulder to Liberty Lake (Washington) | 790.65 mi (1,272.42 km) |
| Boulder to Liberty Triangle (Florida) | 1,506.70 mi (2,424.80 km) |
| Boulder to Libertyville (Illinois) | 911.05 mi (1,466.19 km) |
| Boulder to Lighthouse Point (Florida) | 1,728.38 mi (2,781.55 km) |
| Boulder to Lilburn (Georgia) | 1,236.84 mi (1,990.50 km) |
