| Castle Rock to Hazleton (Pennsylvania) | 1,521.90 mi (2,449.26 km) |
| Castle Rock to Healdsburg (California) | 966.95 mi (1,556.16 km) |
| Castle Rock to Heath (Ohio) | 1,189.14 mi (1,913.73 km) |
| Castle Rock to Heber (Utah) | 355.32 mi (571.83 km) |
| Castle Rock to Helena (Alabama) | 1,082.98 mi (1,742.89 km) |
| Castle Rock to Helena (Montana) | 615.93 mi (991.24 km) |
| Castle Rock to Hemet (California) | 777.59 mi (1,251.40 km) |
| Castle Rock to Henderson (Kentucky) | 937.21 mi (1,508.29 km) |
| Castle Rock to Henderson (Nevada) | 602.89 mi (970.26 km) |
| Castle Rock to Henderson (North Carolina) | 1,452.41 mi (2,337.43 km) |
| Castle Rock to Henderson (Texas) | 751.89 mi (1,210.04 km) |
| Castle Rock to Hendersonville (North Carolina) | 1,258.03 mi (2,024.60 km) |
| Castle Rock to Hendersonville (Tennessee) | 1,016.45 mi (1,635.81 km) |
| Castle Rock to Hercules (California) | 941.81 mi (1,515.69 km) |
| Castle Rock to Hereford (Texas) | 342.42 mi (551.07 km) |
