The CHP received reports of a vehicle off the road south of Rocky Point Road in Marin County shortly before 4:30 p.m. today, according to CHP Officer Andrew Barclay.
Officers arriving at the scene found a red Honda Accord around 200 feet down a cliff with major damage, Barclay said.
The driver and sole occupant of the vehicle was located and pronounced dead a short time later.
Investigators determined the car had been reported stolen out of Vallejo. They are still working to identify the driver.
A Sonoma County Sheriff's Office helicopter was used to remove his body due to the steep terrain, Barclay said.
State Highway 1 was closed in both directions until around 7 p.m. by the crash.