| Castle Rock to Beyne-Heusay | 4,934.96 mi (7,942.04 km) |
| Castle Rock to Bierbeek | 4,895.72 mi (7,878.89 km) |
| Castle Rock to Bilzen | 4,919.37 mi (7,916.96 km) |
| Castle Rock to Binche | 4,894.43 mi (7,876.82 km) |
| Castle Rock to Bissegem | 4,843.93 mi (7,795.56 km) |
| Castle Rock to Blankenberge | 4,819.75 mi (7,756.63 km) |
| Castle Rock to Blegny | 4,935.51 mi (7,942.94 km) |
| Castle Rock to Bocholt | 4,907.88 mi (7,898.47 km) |
| Castle Rock to Boechout | 4,872.29 mi (7,841.20 km) |
| Castle Rock to Bonheiden | 4,879.08 mi (7,852.13 km) |
| Castle Rock to Boom | 4,871.30 mi (7,839.60 km) |
| Castle Rock to Boortmeerbeek | 4,882.40 mi (7,857.46 km) |
| Castle Rock to Borgerhout | 4,868.17 mi (7,834.56 km) |
| Castle Rock to Borgloon | 4,916.44 mi (7,912.24 km) |
| Castle Rock to Bornem | 4,866.08 mi (7,831.21 km) |
