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.  PLEASE NOTE:  BOULDER COUNTY ROAD MAPS ARE CURRENTLY NOT AVAILABLE FOR PURCHASE.  WE ARE IN THE PROCESS OF UPDATING THE ROAD MAP INFORMATION.

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.