| Castle Rock to Hormigueros (Puerto Rico) | 2,686.14 mi (4,322.92 km) |
| Castle Rock to Horn Lake (Mississippi) | 869.26 mi (1,398.93 km) |
| Castle Rock to Hot Springs (Arkansas) | 733.31 mi (1,180.15 km) |
| Castle Rock to Hot Springs Village (Arkansas) | 731.67 mi (1,177.51 km) |
| Castle Rock to Houma (Louisiana) | 1,050.03 mi (1,689.86 km) |
| Castle Rock to Houston (Texas) | 852.71 mi (1,372.31 km) |
| Castle Rock to Howard (Wisconsin) | 930.55 mi (1,497.58 km) |
| Castle Rock to Huber Heights (Ohio) | 1,101.91 mi (1,773.35 km) |
| Castle Rock to Hudson (Florida) | 1,475.86 mi (2,375.17 km) |
| Castle Rock to Hudson (Ohio) | 1,236.52 mi (1,989.98 km) |
| Castle Rock to Hudson (Wisconsin) | 729.86 mi (1,174.59 km) |
| Castle Rock to Hueytown (Alabama) | 1,071.16 mi (1,723.87 km) |
| Castle Rock to Hugo (Minnesota) | 726.78 mi (1,169.65 km) |
| Castle Rock to Humacao (Puerto Rico) | 2,750.36 mi (4,426.28 km) |
| Castle Rock to Humble (Texas) | 845.76 mi (1,361.12 km) |
