| Boulder to Beacon (New York) | 1,631.54 mi (2,625.70 km) |
| Boulder to Bear (Delaware) | 1,562.25 mi (2,514.20 km) |
| Boulder to Beatrice (Nebraska) | 449.43 mi (723.29 km) |
| Boulder to Beaufort (South Carolina) | 1,457.53 mi (2,345.67 km) |
| Boulder to Beaumont (California) | 771.97 mi (1,242.37 km) |
| Boulder to Beaumont (Texas) | 929.23 mi (1,495.46 km) |
| Boulder to Beaver Dam (Wisconsin) | 877.68 mi (1,412.49 km) |
| Boulder to Beavercreek (Ohio) | 1,121.09 mi (1,804.22 km) |
| Boulder to Beaverton (Oregon) | 964.92 mi (1,552.89 km) |
| Boulder to Beckley (West Virginia) | 1,299.27 mi (2,090.97 km) |
| Boulder to Bedford (Indiana) | 1,002.52 mi (1,613.40 km) |
| Boulder to Bedford (Ohio) | 1,241.85 mi (1,998.57 km) |
| Boulder to Bedford (Texas) | 669.91 mi (1,078.11 km) |
| Boulder to Bedford Heights (Ohio) | 1,243.39 mi (2,001.04 km) |
| Boulder to Beech Grove (Indiana) | 1,014.58 mi (1,632.81 km) |
