| Boulder to Lomita (California) | 839.15 mi (1,350.48 km) |
| Boulder to Lompoc (California) | 912.83 mi (1,469.05 km) |
| Boulder to London (Ohio) | 1,152.46 mi (1,854.70 km) |
| Boulder to Lone Tree (Colorado) | 39.68 mi (63.87 km) |
| Boulder to Long Beach (California) | 831.87 mi (1,338.77 km) |
| Boulder to Long Beach (Mississippi) | 1,124.40 mi (1,809.54 km) |
| Boulder to Long Beach (New York) | 1,655.76 mi (2,664.69 km) |
| Boulder to Long Branch (New Jersey) | 1,642.14 mi (2,642.78 km) |
| Boulder to Longmont (Colorado) | 12.77 mi (20.56 km) |
| Boulder to Longview (Texas) | 780.24 mi (1,255.68 km) |
| Boulder to Longview (Washington) | 985.82 mi (1,586.53 km) |
| Boulder to Longwood (Florida) | 1,564.46 mi (2,517.76 km) |
| Boulder to Lorain (Ohio) | 1,208.14 mi (1,944.31 km) |
| Boulder to Lorton (Virginia) | 1,494.31 mi (2,404.86 km) |
| Boulder to Los Alamitos (California) | 826.83 mi (1,330.65 km) |
