A Pleasanton woman died in a solo-vehicle crash along San Pablo Dam Road in Orinda overnight, the California Highway Patrol reported on Monday.
The Contra Costa County Coroner's Office identified the victim as 33-year-old Domenica Maurice.
The investigation unfolded at about 12:20 a.m. Monday when Contra Costa CHP received a report about a crash down an embankment on San Pablo Dam Road, just north of Bear Creek Road.
Upon arrival, emergency responders determined that the 2013 Kia Optima went off San Pablo Dam Road to the right side, crashed into and through a metal guardrail, and then careened down a steep embankment hitting several trees along the way, according to the CHP.
The driver -- later identified as Maurice -- appeared to have not been wearing a seatbelt and was ejected from the Optima as a result, according to the CHP. She was pronounced dead at the scene.
No other vehicles or parties were involved, according to the CHP. Investigators are still trying to determine whether alcohol or drugs were a factor. Anyone who witnessed the crash or the events leading up to it can contact Contra Costa CHP in Martinez at 925-646-4980.