| Castle Rock to Robertsville (New Jersey) | 1,614.14 mi (2,597.70 km) |
| Castle Rock to Robinson (Texas) | 699.07 mi (1,125.04 km) |
| Castle Rock to Robstown (Texas) | 900.00 mi (1,448.40 km) |
| Castle Rock to Rochester (Michigan) | 1,152.23 mi (1,854.34 km) |
| Castle Rock to Rochester (Minnesota) | 713.39 mi (1,148.09 km) |
| Castle Rock to Rochester (New Hampshire) | 1,765.75 mi (2,841.69 km) |
| Castle Rock to Rochester (New York) | 1,431.87 mi (2,304.37 km) |
| Castle Rock to Rochester Hills (Michigan) | 1,150.28 mi (1,851.19 km) |
| Castle Rock to Rock Hill (South Carolina) | 1,343.20 mi (2,161.67 km) |
| Castle Rock to Rock Island (Illinois) | 763.51 mi (1,228.75 km) |
| Castle Rock to Rock Springs (Wyoming) | 275.93 mi (444.06 km) |
| Castle Rock to Rockford (Illinois) | 847.95 mi (1,364.64 km) |
| Castle Rock to Rockledge (Florida) | 1,573.51 mi (2,532.32 km) |
| Castle Rock to Rocklin (California) | 878.89 mi (1,414.43 km) |
| Castle Rock to Rockport (Texas) | 901.73 mi (1,451.20 km) |
