| Castle Rock to Beeville (Texas) | 859.87 mi (1,383.82 km) |
| Castle Rock to Bel Air (Maryland) | 1,514.44 mi (2,437.26 km) |
| Castle Rock to Bel Air North (Maryland) | 1,512.80 mi (2,434.62 km) |
| Castle Rock to Bel Air South (Maryland) | 1,516.61 mi (2,440.75 km) |
| Castle Rock to Belgrade (Montana) | 546.50 mi (879.51 km) |
| Castle Rock to Bell (California) | 826.05 mi (1,329.41 km) |
| Castle Rock to Bell Gardens (California) | 825.32 mi (1,328.22 km) |
| Castle Rock to Bella Vista (Arkansas) | 610.38 mi (982.31 km) |
| Castle Rock to Bellair-Meadowbrook Terrace (Florida) | 1,451.90 mi (2,336.60 km) |
| Castle Rock to Bellaire (Texas) | 854.67 mi (1,375.45 km) |
| Castle Rock to Belle Chasse (Louisiana) | 1,067.87 mi (1,718.57 km) |
| Castle Rock to Belle Glade (Florida) | 1,644.41 mi (2,646.42 km) |
| Castle Rock to Bellefontaine (Ohio) | 1,117.84 mi (1,798.99 km) |
| Castle Rock to Bellefontaine Neighbors (Missouri) | 784.93 mi (1,263.22 km) |
| Castle Rock to Belleville (Illinois) | 800.01 mi (1,287.49 km) |
