| Boulder to Firestone (Colorado) | 18.42 mi (29.64 km) |
| Boulder to Fish Hawk (Florida) | 1,558.28 mi (2,507.81 km) |
| Boulder to Fishers (Indiana) | 1,018.94 mi (1,639.82 km) |
| Boulder to Fitchburg (Massachusetts) | 1,733.09 mi (2,789.15 km) |
| Boulder to Fitchburg (Wisconsin) | 842.70 mi (1,356.19 km) |
| Boulder to Five Corners (Washington) | 958.04 mi (1,541.82 km) |
| Boulder to Five Forks (South Carolina) | 1,309.78 mi (2,107.89 km) |
| Boulder to Flagstaff (Arizona) | 482.63 mi (776.72 km) |
| Boulder to Flat Rock (Michigan) | 1,150.82 mi (1,852.07 km) |
| Boulder to Fleming Island (Florida) | 1,491.11 mi (2,399.71 km) |
| Boulder to Flint (Michigan) | 1,131.08 mi (1,820.30 km) |
| Boulder to Floral Park (New York) | 1,652.42 mi (2,659.31 km) |
| Boulder to Florence (Alabama) | 1,027.38 mi (1,653.40 km) |
| Boulder to Florence (Arizona) | 590.31 mi (950.02 km) |
| Boulder to Florence (Kentucky) | 1,098.31 mi (1,767.56 km) |
