| Castle Rock to River Ridge (Louisiana) | 1,053.48 mi (1,695.42 km) |
| Castle Rock to Riverbank (California) | 875.66 mi (1,409.24 km) |
| Castle Rock to Riverdale (Georgia) | 1,201.54 mi (1,933.69 km) |
| Castle Rock to Riverdale (Illinois) | 916.29 mi (1,474.62 km) |
| Castle Rock to Riverside (California) | 789.15 mi (1,270.01 km) |
| Castle Rock to Riverside (Ohio) | 1,101.90 mi (1,773.34 km) |
| Castle Rock to Riverton (Utah) | 384.67 mi (619.07 km) |
| Castle Rock to Riverton (Wyoming) | 313.64 mi (504.75 km) |
| Castle Rock to Riverview (Florida) | 1,517.08 mi (2,441.50 km) |
| Castle Rock to Riverview (Michigan) | 1,146.40 mi (1,844.95 km) |
| Castle Rock to Riviera Beach (Florida) | 1,669.36 mi (2,686.58 km) |
| Castle Rock to Riviera Beach (Maryland) | 1,509.07 mi (2,428.62 km) |
| Castle Rock to Roanoke (Virginia) | 1,352.83 mi (2,177.17 km) |
| Castle Rock to Roanoke Rapids (North Carolina) | 1,491.02 mi (2,399.56 km) |
| Castle Rock to Robbinsdale (Minnesota) | 706.09 mi (1,136.34 km) |
