| Castle Rock to Friendswood (Texas) | 874.79 mi (1,407.84 km) |
| Castle Rock to Frisco (Texas) | 619.91 mi (997.65 km) |
| Castle Rock to Front Royal (Virginia) | 1,424.11 mi (2,291.88 km) |
| Castle Rock to Fruit Cove (Florida) | 1,461.00 mi (2,351.25 km) |
| Castle Rock to Fruita (Colorado) | 207.94 mi (334.65 km) |
| Castle Rock to Fruitville (Florida) | 1,530.28 mi (2,462.75 km) |
| Castle Rock to Fuller Heights (Florida) | 1,527.68 mi (2,458.56 km) |
| Castle Rock to Fullerton (California) | 817.10 mi (1,315.00 km) |
| Castle Rock to Fullerton (Pennsylvania) | 1,549.63 mi (2,493.89 km) |
| Castle Rock to Fulshear (Texas) | 840.71 mi (1,353.00 km) |
| Castle Rock to Fulton (Missouri) | 692.02 mi (1,113.70 km) |
| Castle Rock to Fulton (New York) | 1,492.41 mi (2,401.80 km) |
| Castle Rock to Fuquay-Varina (North Carolina) | 1,448.04 mi (2,330.39 km) |
| Castle Rock to Gadsden (Alabama) | 1,105.05 mi (1,778.41 km) |
| Castle Rock to Gaffney (South Carolina) | 1,306.51 mi (2,102.62 km) |
