| Castle Rock to Bridgeport (Connecticut) | 1,664.12 mi (2,678.14 km) |
| Castle Rock to Bridgeton (Missouri) | 774.14 mi (1,245.87 km) |
| Castle Rock to Bridgetown (Ohio) | 1,079.35 mi (1,737.05 km) |
| Castle Rock to Bridgeview (Illinois) | 908.05 mi (1,461.36 km) |
| Castle Rock to Brigham City (Utah) | 405.58 mi (652.72 km) |
| Castle Rock to Brighton (Colorado) | 41.24 mi (66.38 km) |
| Castle Rock to Bristol (Connecticut) | 1,673.88 mi (2,693.85 km) |
| Castle Rock to Bristol (Tennessee) | 1,245.03 mi (2,003.69 km) |
| Castle Rock to Bristol (Virginia) | 1,246.82 mi (2,006.57 km) |
| Castle Rock to Broadlands (Virginia) | 1,458.37 mi (2,347.02 km) |
| Castle Rock to Broadview Heights (Ohio) | 1,224.06 mi (1,969.94 km) |
| Castle Rock to Brock Hall (Maryland) | 1,501.04 mi (2,415.69 km) |
| Castle Rock to Brockton (Massachusetts) | 1,769.48 mi (2,847.71 km) |
| Castle Rock to Broken Arrow (Oklahoma) | 546.61 mi (879.68 km) |
| Castle Rock to Bronx (New York) | 1,632.01 mi (2,626.47 km) |
