| Boulder to Bay City (Michigan) | 1,124.13 mi (1,809.11 km) |
| Boulder to Bay City (Texas) | 927.14 mi (1,492.09 km) |
| Boulder to Bay Point (California) | 905.95 mi (1,457.99 km) |
| Boulder to Bay Shore (New York) | 1,675.81 mi (2,696.96 km) |
| Boulder to Bay Village (Ohio) | 1,221.02 mi (1,965.05 km) |
| Boulder to Bayamón (Puerto Rico) | 2,758.92 mi (4,440.05 km) |
| Boulder to Bayonet Point (Florida) | 1,515.62 mi (2,439.16 km) |
| Boulder to Bayonne (New Jersey) | 1,631.63 mi (2,625.85 km) |
| Boulder to Bayou Blue (Louisiana) | 1,092.39 mi (1,758.03 km) |
| Boulder to Bayou Cane (Louisiana) | 1,089.57 mi (1,753.49 km) |
| Boulder to Bayshore Gardens (Florida) | 1,559.24 mi (2,509.36 km) |
| Boulder to Baytown (Texas) | 916.71 mi (1,475.31 km) |
| Boulder to Beach Park (Illinois) | 917.31 mi (1,476.26 km) |
| Boulder to Beachwood (New Jersey) | 1,635.58 mi (2,632.21 km) |
| Boulder to Beachwood (Ohio) | 1,243.22 mi (2,000.76 km) |
