| Round Rock to Badger (Alaska) | 3,167.03 mi (5,096.84 km) |
| Round Rock to Bailey's Crossroads (Virginia) | 1,296.47 mi (2,086.47 km) |
| Round Rock to Bainbridge (Georgia) | 777.60 mi (1,251.43 km) |
| Round Rock to Bainbridge Island (Washington) | 1,768.65 mi (2,846.36 km) |
| Round Rock to Baker (Louisiana) | 387.07 mi (622.92 km) |
| Round Rock to Bakersfield (California) | 1,280.46 mi (2,060.70 km) |
| Round Rock to Balch Springs (Texas) | 163.57 mi (263.24 km) |
| Round Rock to Baldwin (New York) | 1,514.95 mi (2,438.08 km) |
| Round Rock to Baldwin (Pennsylvania) | 1,202.43 mi (1,935.12 km) |
| Round Rock to Baldwin Park (California) | 1,208.98 mi (1,945.67 km) |
| Round Rock to Ballenger Creek (Maryland) | 1,295.16 mi (2,084.36 km) |
| Round Rock to Ballwin (Missouri) | 688.39 mi (1,107.86 km) |
| Round Rock to Baltimore (Maryland) | 1,333.41 mi (2,145.92 km) |
| Round Rock to Bangor (Maine) | 1,847.59 mi (2,973.41 km) |
| Round Rock to Banning (California) | 1,146.86 mi (1,845.69 km) |
