| Castle Rock to Badger (Alaska) | 2,436.14 mi (3,920.59 km) |
| Castle Rock to Bailey's Crossroads (Virginia) | 1,480.83 mi (2,383.17 km) |
| Castle Rock to Bainbridge (Georgia) | 1,282.57 mi (2,064.10 km) |
| Castle Rock to Bainbridge Island (Washington) | 1,050.75 mi (1,691.01 km) |
| Castle Rock to Baker (Louisiana) | 983.04 mi (1,582.05 km) |
| Castle Rock to Bakersfield (California) | 825.84 mi (1,329.06 km) |
| Castle Rock to Balch Springs (Texas) | 650.09 mi (1,046.22 km) |
| Castle Rock to Baldwin (New York) | 1,647.12 mi (2,650.78 km) |
| Castle Rock to Baldwin (Pennsylvania) | 1,317.09 mi (2,119.66 km) |
| Castle Rock to Baldwin Park (California) | 812.21 mi (1,307.12 km) |
| Castle Rock to Ballenger Creek (Maryland) | 1,459.41 mi (2,348.69 km) |
| Castle Rock to Ballwin (Missouri) | 769.28 mi (1,238.03 km) |
| Castle Rock to Baltimore (Maryland) | 1,502.77 mi (2,418.48 km) |
| Castle Rock to Bangor (Maine) | 1,870.62 mi (3,010.47 km) |
| Castle Rock to Banning (California) | 764.88 mi (1,230.95 km) |
