| Round Rock to Bollullos par del Condado | 5,034.66 mi (8,102.51 km) |
| Round Rock to Bormujos | 5,056.96 mi (8,138.39 km) |
| Round Rock to Brenes | 5,061.29 mi (8,145.36 km) |
| Round Rock to Brunete | 5,065.15 mi (8,151.57 km) |
| Round Rock to Bueu | 4,784.24 mi (7,699.49 km) |
| Round Rock to Bullas | 5,249.79 mi (8,448.73 km) |
| Round Rock to Bunol | 5,247.09 mi (8,444.38 km) |
| Round Rock to Burela de Cabo | 4,812.43 mi (7,744.85 km) |
| Round Rock to Burgos | 5,020.08 mi (8,079.03 km) |
| Round Rock to Burjasot | 5,262.29 mi (8,468.83 km) |
| Round Rock to Burriana | 5,264.39 mi (8,472.22 km) |
| Round Rock to Cabanaquinta | 4,911.24 mi (7,903.87 km) |
| Round Rock to Cabanillas del Campo | 5,093.53 mi (8,197.25 km) |
| Round Rock to Cabra | 5,134.25 mi (8,262.78 km) |
| Round Rock to Caceres | 4,979.27 mi (8,013.36 km) |
