| Castle Rock to Eggertsville (New York) | 1,371.47 mi (2,207.17 km) |
| Castle Rock to Egypt Lake-Leto (Florida) | 1,499.00 mi (2,412.41 km) |
| Castle Rock to El Cajon (California) | 813.27 mi (1,308.84 km) |
| Castle Rock to El Campo (Texas) | 855.97 mi (1,377.55 km) |
| Castle Rock to El Centro (California) | 750.54 mi (1,207.88 km) |
| Castle Rock to El Cerrito (California) | 945.45 mi (1,521.55 km) |
| Castle Rock to El Dorado (Arkansas) | 800.00 mi (1,287.48 km) |
| Castle Rock to El Dorado (Kansas) | 444.58 mi (715.48 km) |
| Castle Rock to El Dorado Hills (California) | 869.49 mi (1,399.32 km) |
| Castle Rock to El Mirage (Arizona) | 575.94 mi (926.89 km) |
| Castle Rock to El Monte (California) | 815.33 mi (1,312.14 km) |
| Castle Rock to El Paso (Texas) | 527.64 mi (849.15 km) |
| Castle Rock to El Paso de Robles (California) | 902.41 mi (1,452.28 km) |
| Castle Rock to El Reno (Oklahoma) | 461.12 mi (742.10 km) |
| Castle Rock to El Segundo (California) | 839.22 mi (1,350.60 km) |
