| Castle Rock to Eagle (Idaho) | 666.87 mi (1,073.22 km) |
| Castle Rock to Eagle Mountain (Utah) | 385.09 mi (619.74 km) |
| Castle Rock to Eagle Pass (Texas) | 777.82 mi (1,251.79 km) |
| Castle Rock to Easley (South Carolina) | 1,263.48 mi (2,033.38 km) |
| Castle Rock to East Bakersfield (California) | 821.82 mi (1,322.59 km) |
| Castle Rock to East Bethel (Minnesota) | 722.97 mi (1,163.52 km) |
| Castle Rock to East Chicago (Indiana) | 925.68 mi (1,489.73 km) |
| Castle Rock to East Cleveland (Ohio) | 1,228.89 mi (1,977.71 km) |
| Castle Rock to East Glenville (New York) | 1,618.44 mi (2,604.63 km) |
| Castle Rock to East Grand Rapids (Michigan) | 1,028.49 mi (1,655.20 km) |
| Castle Rock to East Hemet (California) | 775.07 mi (1,247.35 km) |
| Castle Rock to East Highland Park (Virginia) | 1,485.16 mi (2,390.13 km) |
| Castle Rock to East Honolulu (Hawaii) | 3,337.46 mi (5,371.12 km) |
| Castle Rock to East Islip (New York) | 1,668.33 mi (2,684.92 km) |
| Castle Rock to East Lake (Florida) | 1,485.94 mi (2,391.38 km) |
