| Castle Rock to Hilliard (Ohio) | 1,151.30 mi (1,852.84 km) |
| Castle Rock to Hillsboro (Oregon) | 1,012.09 mi (1,628.81 km) |
| Castle Rock to Hillsborough (California) | 953.76 mi (1,534.93 km) |
| Castle Rock to Hillsborough (New Jersey) | 1,593.96 mi (2,565.23 km) |
| Castle Rock to Hilo (Hawaii) | 3,262.02 mi (5,249.71 km) |
| Castle Rock to Hilton Head Island (South Carolina) | 1,434.02 mi (2,307.84 km) |
| Castle Rock to Hinesville (Georgia) | 1,400.91 mi (2,254.55 km) |
| Castle Rock to Hinsdale (Illinois) | 902.21 mi (1,451.97 km) |
| Castle Rock to Hobart (Indiana) | 934.46 mi (1,503.87 km) |
| Castle Rock to Hobbs (New Mexico) | 468.96 mi (754.72 km) |
| Castle Rock to Hobe Sound (Florida) | 1,653.77 mi (2,661.48 km) |
| Castle Rock to Hoboken (New Jersey) | 1,624.45 mi (2,614.31 km) |
| Castle Rock to Hockessin (Delaware) | 1,546.82 mi (2,489.37 km) |
| Castle Rock to Hoffman Estates (Illinois) | 892.81 mi (1,436.84 km) |
| Castle Rock to Holbrook (New York) | 1,673.80 mi (2,693.73 km) |
