County Road Information

Boulder County regulates nearly 700 miles of roadway.  A county road is defined as one that is shown on the Boulder County Road Map, excluding those within city limits (with some exceptions) and those that are labeled as a State Highway (shown in red).  To determine if the road in question is a county road, you may download a Boulder County Road Map, purchase one at the Boulder County Transportation Department office, or call (303) 441-3900.  .

Transportation projects on Boulder County roads are funded in three basic ways:  the road and bridge mil levy on property taxes in Boulder County, a portion of the State Highway Users Tax Fund (HUTF) collected from gasoline and diesel fuel taxes at the pump and the recently voter-approved seven-year County Transportation Sales Tax.  Currently, only the Road and Bridge Mil Levy and the HUTF funds pay for maintenance of Boulder County roads.