| Boulder to Friendswood (Texas) | 922.41 mi (1,484.48 km) |
| Boulder to Frisco (Texas) | 665.69 mi (1,071.33 km) |
| Boulder to Front Royal (Virginia) | 1,440.09 mi (2,317.60 km) |
| Boulder to Fruit Cove (Florida) | 1,495.89 mi (2,407.40 km) |
| Boulder to Fruita (Colorado) | 194.69 mi (313.32 km) |
| Boulder to Fruitville (Florida) | 1,569.29 mi (2,525.53 km) |
| Boulder to Fuller Heights (Florida) | 1,565.66 mi (2,519.68 km) |
| Boulder to Fullerton (California) | 817.21 mi (1,315.17 km) |
| Boulder to Fullerton (Pennsylvania) | 1,561.08 mi (2,512.32 km) |
| Boulder to Fulshear (Texas) | 888.73 mi (1,430.27 km) |
| Boulder to Fulton (Missouri) | 713.67 mi (1,148.55 km) |
| Boulder to Fulton (New York) | 1,497.89 mi (2,410.62 km) |
| Boulder to Fuquay-Varina (North Carolina) | 1,471.44 mi (2,368.06 km) |
| Boulder to Gadsden (Alabama) | 1,136.83 mi (1,829.56 km) |
| Boulder to Gaffney (South Carolina) | 1,332.73 mi (2,144.81 km) |
