| Boulder to Brandon (Florida) | 1,550.60 mi (2,495.45 km) |
| Boulder to Brandon (Mississippi) | 1,003.60 mi (1,615.14 km) |
| Boulder to Brandon (South Dakota) | 509.77 mi (820.40 km) |
| Boulder to Branson (Missouri) | 689.60 mi (1,109.80 km) |
| Boulder to Braselton (Georgia) | 1,246.96 mi (2,006.78 km) |
| Boulder to Brawley (California) | 749.26 mi (1,205.82 km) |
| Boulder to Brea (California) | 812.64 mi (1,307.81 km) |
| Boulder to Brecksville (Ohio) | 1,237.91 mi (1,992.23 km) |
| Boulder to Bremerton (Washington) | 1,010.68 mi (1,626.54 km) |
| Boulder to Brenham (Texas) | 844.79 mi (1,359.56 km) |
| Boulder to Brent (Florida) | 1,207.74 mi (1,943.67 km) |
| Boulder to Brentwood (California) | 894.80 mi (1,440.03 km) |
| Boulder to Brentwood (New York) | 1,675.09 mi (2,695.79 km) |
| Boulder to Brentwood (Tennessee) | 1,041.58 mi (1,676.26 km) |
| Boulder to Bridgeport (Connecticut) | 1,673.92 mi (2,693.92 km) |
