| Castle Rock to Decatur (Georgia) | 1,201.42 mi (1,933.49 km) |
| Castle Rock to Decatur (Illinois) | 846.83 mi (1,362.85 km) |
| Castle Rock to Deer Park (New York) | 1,661.01 mi (2,673.13 km) |
| Castle Rock to Deer Park (Texas) | 867.85 mi (1,396.67 km) |
| Castle Rock to Deerfield (Illinois) | 908.63 mi (1,462.30 km) |
| Castle Rock to Deerfield Beach (Florida) | 1,687.06 mi (2,715.07 km) |
| Castle Rock to Defiance (Ohio) | 1,084.58 mi (1,745.47 km) |
| Castle Rock to DeForest (Wisconsin) | 846.46 mi (1,362.24 km) |
| Castle Rock to DeKalb (Illinois) | 861.10 mi (1,385.80 km) |
| Castle Rock to Del Aire (California) | 837.63 mi (1,348.04 km) |
| Castle Rock to Del City (Oklahoma) | 488.76 mi (786.58 km) |
| Castle Rock to Del Rio (Texas) | 727.28 mi (1,170.45 km) |
| Castle Rock to DeLand (Florida) | 1,518.36 mi (2,443.56 km) |
| Castle Rock to Delano (California) | 826.53 mi (1,330.18 km) |
| Castle Rock to Delaware (Ohio) | 1,154.40 mi (1,857.83 km) |
