| Castle Rock to El Sobrante (California) | 794.84 mi (1,279.17 km) |
| Castle Rock to Eldersburg (Maryland) | 1,483.84 mi (2,388.01 km) |
| Castle Rock to Elfers (Florida) | 1,480.28 mi (2,382.28 km) |
| Castle Rock to Elgin (Illinois) | 883.57 mi (1,421.98 km) |
| Castle Rock to Elizabeth (New Jersey) | 1,616.62 mi (2,601.71 km) |
| Castle Rock to Elizabeth City (North Carolina) | 1,569.40 mi (2,525.70 km) |
| Castle Rock to Elizabethton (Tennessee) | 1,248.13 mi (2,008.68 km) |
| Castle Rock to Elizabethtown (Kentucky) | 1,030.10 mi (1,657.79 km) |
| Castle Rock to Elizabethtown (Pennsylvania) | 1,495.23 mi (2,406.35 km) |
| Castle Rock to Elk City (Oklahoma) | 405.64 mi (652.81 km) |
| Castle Rock to Elk Grove (California) | 890.15 mi (1,432.56 km) |
| Castle Rock to Elk Grove Village (Illinois) | 900.27 mi (1,448.84 km) |
| Castle Rock to Elk Plain (Washington) | 1,025.32 mi (1,650.09 km) |
| Castle Rock to Elk River (Minnesota) | 707.02 mi (1,137.83 km) |
| Castle Rock to Elkhart (Indiana) | 1,002.72 mi (1,613.72 km) |
