Park rangers in Jefferson County are sending out a warning to never leave any valuables in cars when parking at trailheads. Six vehicles were broken into on Sunday in parking lots at Jefferson County trailheads. Rangers say to leave your things at home. If you do have important items in your vehicle, stow your stuff in a locked, bolted-down toolbox or out of sight. It’s an important reminder as runners and hikers head out to enjoy Jefferson County trails this month.