| Castle Rock to Burley (Idaho) | 514.70 mi (828.32 km) |
| Castle Rock to Burlingame (California) | 953.75 mi (1,534.91 km) |
| Castle Rock to Burlington (Iowa) | 731.60 mi (1,177.39 km) |
| Castle Rock to Burlington (Kentucky) | 1,075.98 mi (1,731.62 km) |
| Castle Rock to Burlington (North Carolina) | 1,401.11 mi (2,254.87 km) |
| Castle Rock to Burlington (Vermont) | 1,652.38 mi (2,659.24 km) |
| Castle Rock to Burlington (Wisconsin) | 892.21 mi (1,435.87 km) |
| Castle Rock to Burnsville (Minnesota) | 699.70 mi (1,126.06 km) |
| Castle Rock to Burr Ridge (Illinois) | 902.27 mi (1,452.07 km) |
| Castle Rock to Burton (Michigan) | 1,128.92 mi (1,816.82 km) |
| Castle Rock to Burtonsville (Maryland) | 1,487.94 mi (2,394.61 km) |
| Castle Rock to Butler (Pennsylvania) | 1,318.16 mi (2,121.38 km) |
| Castle Rock to Butte (Montana) | 599.92 mi (965.47 km) |
| Castle Rock to Byram (Mississippi) | 953.86 mi (1,535.08 km) |
| Castle Rock to Cabot (Arkansas) | 767.83 mi (1,235.70 km) |
