| Castle Rock to Harrison (Wisconsin) | 913.73 mi (1,470.51 km) |
| Castle Rock to Harrisonburg (Virginia) | 1,393.55 mi (2,242.70 km) |
| Castle Rock to Hartford (Connecticut) | 1,686.56 mi (2,714.25 km) |
| Castle Rock to Hartford (Wisconsin) | 895.21 mi (1,440.70 km) |
| Castle Rock to Hartselle (Alabama) | 1,044.67 mi (1,681.24 km) |
| Castle Rock to Hartsville (Tennessee) | 1,038.21 mi (1,670.84 km) |
| Castle Rock to Harvey (Illinois) | 915.31 mi (1,473.06 km) |
| Castle Rock to Harvey (Louisiana) | 1,063.63 mi (1,711.75 km) |
| Castle Rock to Hasbrouck Heights (New Jersey) | 1,621.13 mi (2,608.95 km) |
| Castle Rock to Haslett (Michigan) | 1,087.75 mi (1,750.57 km) |
| Castle Rock to Hastings (Minnesota) | 717.17 mi (1,154.17 km) |
| Castle Rock to Hastings (Nebraska) | 352.31 mi (566.98 km) |
| Castle Rock to Hattiesburg (Mississippi) | 1,035.76 mi (1,666.90 km) |
| Castle Rock to Hauppauge (New York) | 1,666.26 mi (2,681.59 km) |
| Castle Rock to Havelock (North Carolina) | 1,563.74 mi (2,516.59 km) |
