| Boulder to Lemay (Missouri) | 806.17 mi (1,297.41 km) |
| Boulder to Lemon Grove (California) | 825.42 mi (1,328.39 km) |
| Boulder to Lemon Hill (California) | 871.80 mi (1,403.02 km) |
| Boulder to Lemont (Illinois) | 908.13 mi (1,461.50 km) |
| Boulder to Lemoore (California) | 830.05 mi (1,335.83 km) |
| Boulder to Lenexa (Kansas) | 561.71 mi (903.99 km) |
| Boulder to Lennox (California) | 835.46 mi (1,344.54 km) |
| Boulder to Lenoir (North Carolina) | 1,319.14 mi (2,122.96 km) |
| Boulder to Leominster (Massachusetts) | 1,735.79 mi (2,793.49 km) |
| Boulder to Leon Valley (Texas) | 818.67 mi (1,317.52 km) |
| Boulder to Levelland (Texas) | 472.99 mi (761.20 km) |
| Boulder to Levittown (New York) | 1,662.26 mi (2,675.14 km) |
| Boulder to Levittown (Pennsylvania) | 1,598.98 mi (2,573.31 km) |
| Boulder to Lewisburg (Tennessee) | 1,054.84 mi (1,697.60 km) |
| Boulder to Lewiston (Idaho) | 735.75 mi (1,184.08 km) |
