| Boulder to Beverly Hills (California) | 832.14 mi (1,339.20 km) |
| Boulder to Beverly Hills (Florida) | 1,501.79 mi (2,416.89 km) |
| Boulder to Beverly Hills (Michigan) | 1,152.56 mi (1,854.86 km) |
| Boulder to Bexley (Ohio) | 1,178.25 mi (1,896.21 km) |
| Boulder to Biddeford (Maine) | 1,796.47 mi (2,891.14 km) |
| Boulder to Big Bear City (California) | 749.29 mi (1,205.86 km) |
| Boulder to Big Lake (Minnesota) | 689.39 mi (1,109.47 km) |
| Boulder to Big Spring (Texas) | 577.52 mi (929.43 km) |
| Boulder to Billings (Montana) | 431.77 mi (694.87 km) |
| Boulder to Biloxi (Mississippi) | 1,130.40 mi (1,819.21 km) |
| Boulder to Binghamton (New York) | 1,527.81 mi (2,458.77 km) |
| Boulder to Birmingham (Alabama) | 1,112.85 mi (1,790.96 km) |
| Boulder to Birmingham (Michigan) | 1,153.90 mi (1,857.02 km) |
| Boulder to Bismarck (North Dakota) | 520.05 mi (836.93 km) |
| Boulder to Bithlo (Florida) | 1,581.87 mi (2,545.77 km) |
