| Castro Valley to Blumberg | 5,790.64 mi (9,319.13 km) |
| Castro Valley to Bobenheim-Roxheim | 5,689.96 mi (9,157.11 km) |
| Castro Valley to Bobingen | 5,829.43 mi (9,381.56 km) |
| Castro Valley to Boblingen | 5,757.29 mi (9,265.46 km) |
| Castro Valley to Bocholt | 5,520.59 mi (8,884.54 km) |
| Castro Valley to Bochum | 5,555.59 mi (8,940.86 km) |
| Castro Valley to Bockenem | 5,602.27 mi (9,015.98 km) |
| Castro Valley to Bockhorn | 5,472.34 mi (8,806.87 km) |
| Castro Valley to Bogen | 5,841.57 mi (9,401.09 km) |
| Castro Valley to Bohl-Iggelheim | 5,700.19 mi (9,173.56 km) |
| Castro Valley to Bohmte | 5,536.37 mi (8,909.92 km) |
| Castro Valley to Boizenburg | 5,541.25 mi (8,917.78 km) |
| Castro Valley to Bonen | 5,563.70 mi (8,953.91 km) |
| Castro Valley to Bonn | 5,593.01 mi (9,001.07 km) |
| Castro Valley to Bopfingen | 5,783.93 mi (9,308.34 km) |
