| Castle Rock to Hanahan (South Carolina) | 1,450.72 mi (2,334.70 km) |
| Castle Rock to Hanford (California) | 833.45 mi (1,341.31 km) |
| Castle Rock to Hannibal (Missouri) | 716.84 mi (1,153.64 km) |
| Castle Rock to Hanover (Pennsylvania) | 1,478.12 mi (2,378.81 km) |
| Castle Rock to Hanover Park (Illinois) | 892.30 mi (1,436.02 km) |
| Castle Rock to Happy Valley (Oregon) | 990.43 mi (1,593.94 km) |
| Castle Rock to Harker Heights (Texas) | 703.69 mi (1,132.48 km) |
| Castle Rock to Harlingen (Texas) | 1,000.44 mi (1,610.04 km) |
| Castle Rock to Harper Woods (Michigan) | 1,160.83 mi (1,868.18 km) |
| Castle Rock to Harrisburg (North Carolina) | 1,354.54 mi (2,179.93 km) |
| Castle Rock to Harrisburg (Pennsylvania) | 1,479.27 mi (2,380.66 km) |
| Castle Rock to Harrison (Arkansas) | 675.48 mi (1,087.07 km) |
| Castle Rock to Harrison (New Jersey) | 1,617.97 mi (2,603.88 km) |
| Castle Rock to Harrison (New York) | 1,638.28 mi (2,636.55 km) |
| Castle Rock to Harrison (Ohio) | 1,070.46 mi (1,722.74 km) |
