| Castle Rock to Red Bank (New Jersey) | 1,625.89 mi (2,616.62 km) |
| Castle Rock to Red Bank (Tennessee) | 1,112.82 mi (1,790.91 km) |
| Castle Rock to Red Bluff (California) | 923.50 mi (1,486.23 km) |
| Castle Rock to Red Hill (South Carolina) | 1,479.46 mi (2,380.96 km) |
| Castle Rock to Red Oak (Texas) | 653.60 mi (1,051.86 km) |
| Castle Rock to Red Wing (Minnesota) | 723.62 mi (1,164.56 km) |
| Castle Rock to Redan (Georgia) | 1,209.21 mi (1,946.04 km) |
| Castle Rock to Redding (California) | 929.34 mi (1,495.63 km) |
| Castle Rock to Redland (Maryland) | 1,476.60 mi (2,376.36 km) |
| Castle Rock to Redlands (California) | 774.14 mi (1,245.86 km) |
| Castle Rock to Redmond (Oregon) | 903.97 mi (1,454.81 km) |
| Castle Rock to Redmond (Washington) | 1,034.06 mi (1,664.15 km) |
| Castle Rock to Redondo Beach (California) | 840.07 mi (1,351.96 km) |
| Castle Rock to Redwood City (California) | 947.50 mi (1,524.86 km) |
| Castle Rock to Reedley (California) | 816.54 mi (1,314.09 km) |
