Daphne Kelley, 56, of Clearlake died at UC Davis Medical Center, where she had been taken for treatment, according to CHP Officer Kevin Domby.
Kelley's 1999 Oldsmobile collided with a tree at 8:01 a.m. Wednesday on Highway 29 near Diener Drive, according to CHP incident logs.
Rescue crews had managed to revive her at the accident scene before transporting her to Davis, according to Domby.
The agency reported that Kelley was driving northbound at an unknown rate of speed when her car went into the southbound lane then back into the northbound lane before going off the road and striking the tree on the driver's side.
The CHP has released no further information about the accident or what caused Kelley's vehicle to travel back and forth across the road before the collision took place.
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