| Castle Rock to Berkeley (California) | 944.69 mi (1,520.34 km) |
| Castle Rock to Berkley (Colorado) | 31.01 mi (49.91 km) |
| Castle Rock to Berkley (Michigan) | 1,148.05 mi (1,847.60 km) |
| Castle Rock to Berthoud (Colorado) | 65.09 mi (104.75 km) |
| Castle Rock to Berwick (Pennsylvania) | 1,506.87 mi (2,425.07 km) |
| Castle Rock to Berwyn (Illinois) | 909.47 mi (1,463.65 km) |
| Castle Rock to Bessemer (Alabama) | 1,075.37 mi (1,730.64 km) |
| Castle Rock to Bethany (Oklahoma) | 477.22 mi (768.02 km) |
| Castle Rock to Bethany (Oregon) | 1,008.30 mi (1,622.70 km) |
| Castle Rock to Bethel Park (Pennsylvania) | 1,313.73 mi (2,114.24 km) |
| Castle Rock to Bethesda (Maryland) | 1,479.78 mi (2,381.47 km) |
| Castle Rock to Bethlehem (Pennsylvania) | 1,555.68 mi (2,503.63 km) |
| Castle Rock to Bethpage (New York) | 1,652.61 mi (2,659.62 km) |
| Castle Rock to Bettendorf (Iowa) | 769.71 mi (1,238.72 km) |
| Castle Rock to Beverly (Massachusetts) | 1,774.83 mi (2,856.31 km) |
