The U.S.

Highways in Colorado are the segments of the national United States Numbered Highway System that are owned and maintained by the state of Colorado.

The longest of these highways is U.S. Highway 160 (US 160), which spans 497.223 miles (800.203 km)[1] across southern Colorado.

The standards and numbering for the system are handled by the American Association of State Highway and Transportation Officials (AASHTO) while the routes in the state are maintained by the Colorado Department of Transportation (CDOT).