| Castle Rock to Elkhorn (Wisconsin) | 878.86 mi (1,414.39 km) |
| Castle Rock to Elko (Nevada) | 585.14 mi (941.69 km) |
| Castle Rock to Elkridge (Maryland) | 1,497.24 mi (2,409.58 km) |
| Castle Rock to Elkton (Maryland) | 1,541.32 mi (2,480.52 km) |
| Castle Rock to Ellensburg (Washington) | 947.27 mi (1,524.49 km) |
| Castle Rock to Ellicott City (Maryland) | 1,491.46 mi (2,400.28 km) |
| Castle Rock to Elmhurst (Illinois) | 902.01 mi (1,451.65 km) |
| Castle Rock to Elmira (New York) | 1,473.46 mi (2,371.31 km) |
| Castle Rock to Elmont (New York) | 1,641.45 mi (2,641.66 km) |
| Castle Rock to Elmwood Park (Illinois) | 908.67 mi (1,462.37 km) |
| Castle Rock to Elmwood Park (New Jersey) | 1,618.40 mi (2,604.57 km) |
| Castle Rock to Elon (North Carolina) | 1,398.45 mi (2,250.59 km) |
| Castle Rock to Eloy (Arizona) | 592.70 mi (953.86 km) |
| Castle Rock to Elwood (New York) | 1,659.41 mi (2,670.57 km) |
| Castle Rock to Elyria (Ohio) | 1,201.78 mi (1,934.08 km) |
