The accident was reported about 8:15 a.m. on Tunitas Creek Road near state Highway 35, in the area of the Tunitas Creek Open Space Preserve.
The woman exited her car to open a gate on a roadside property and the vehicle started to roll away, CHP Officer Art Montiel said. She tried to reach through an open window to stop the car but was dragged about 12 feet, Montiel said.
The woman eventually dislodged herself from the car before it continued moving, broke through the gate and rolled across Tunitas Creek Road and 300 feet down an embankment, Montiel said.
The woman suffered moderate leg and back injuries in the accident.