| Castle Rock to Dixon (Illinois) | 823.04 mi (1,324.55 km) |
| Castle Rock to Dobbs Ferry (New York) | 1,630.57 mi (2,624.14 km) |
| Castle Rock to Doctor Phillips (Florida) | 1,531.02 mi (2,463.94 km) |
| Castle Rock to Dodge City (Kansas) | 284.00 mi (457.05 km) |
| Castle Rock to Dolton (Illinois) | 918.20 mi (1,477.70 km) |
| Castle Rock to Donna (Texas) | 994.94 mi (1,601.20 km) |
| Castle Rock to Dorado (Puerto Rico) | 2,713.73 mi (4,367.32 km) |
| Castle Rock to Doral (Florida) | 1,697.36 mi (2,731.63 km) |
| Castle Rock to Doraville (Georgia) | 1,198.82 mi (1,929.32 km) |
| Castle Rock to Dothan (Alabama) | 1,228.78 mi (1,977.54 km) |
| Castle Rock to Douglas (Arizona) | 613.32 mi (987.05 km) |
| Castle Rock to Douglas (Georgia) | 1,347.85 mi (2,169.15 km) |
| Castle Rock to Douglasville (Georgia) | 1,181.05 mi (1,900.71 km) |
| Castle Rock to Dover (Delaware) | 1,562.17 mi (2,514.08 km) |
| Castle Rock to Dover (New Hampshire) | 1,770.88 mi (2,849.96 km) |
