| Castle Rock to Firestone (Colorado) | 54.15 mi (87.14 km) |
| Castle Rock to Fish Hawk (Florida) | 1,520.05 mi (2,446.28 km) |
| Castle Rock to Fishers (Indiana) | 1,003.47 mi (1,614.93 km) |
| Castle Rock to Fitchburg (Massachusetts) | 1,726.36 mi (2,778.31 km) |
| Castle Rock to Fitchburg (Wisconsin) | 838.73 mi (1,349.80 km) |
| Castle Rock to Five Corners (Washington) | 999.16 mi (1,607.99 km) |
| Castle Rock to Five Forks (South Carolina) | 1,282.62 mi (2,064.17 km) |
| Castle Rock to Flagstaff (Arizona) | 471.06 mi (758.10 km) |
| Castle Rock to Flat Rock (Michigan) | 1,142.25 mi (1,838.28 km) |
| Castle Rock to Fleming Island (Florida) | 1,456.15 mi (2,343.44 km) |
| Castle Rock to Flint (Michigan) | 1,125.35 mi (1,811.07 km) |
| Castle Rock to Floral Park (New York) | 1,641.54 mi (2,641.81 km) |
| Castle Rock to Florence (Alabama) | 996.00 mi (1,602.90 km) |
| Castle Rock to Florence (Arizona) | 569.33 mi (916.24 km) |
| Castle Rock to Florence (Kentucky) | 1,080.25 mi (1,738.50 km) |
