| Boulder to Lindsay (California) | 796.04 mi (1,281.11 km) |
| Boulder to Linganore (Maryland) | 1,479.97 mi (2,381.78 km) |
| Boulder to Lino Lakes (Minnesota) | 712.62 mi (1,146.85 km) |
| Boulder to Linthicum (Maryland) | 1,516.18 mi (2,440.05 km) |
| Boulder to Linton Hall (Virginia) | 1,474.59 mi (2,373.12 km) |
| Boulder to Lisle (Illinois) | 902.98 mi (1,453.20 km) |
| Boulder to Lithia Springs (Georgia) | 1,213.86 mi (1,953.52 km) |
| Boulder to Little Canada (Minnesota) | 708.24 mi (1,139.80 km) |
| Boulder to Little Chute (Wisconsin) | 913.93 mi (1,470.82 km) |
| Boulder to Little Elm (Texas) | 659.99 mi (1,062.15 km) |
| Boulder to Little Ferry (New Jersey) | 1,633.77 mi (2,629.30 km) |
| Boulder to Little Rock (Arkansas) | 795.97 mi (1,280.99 km) |
| Boulder to Littleton (Colorado) | 32.40 mi (52.15 km) |
| Boulder to Live Oak (California) | 927.00 mi (1,491.86 km) |
| Boulder to Live Oak (Texas) | 822.23 mi (1,323.25 km) |
