Rebecca Manka, 45, died as the result of the rollover crash, which occurred on Lakeview Drive in Clearlake Oaks at 11:30 a.m. Thursday, CHP Officer Steve Tanguay said.
Tanguay said Manka was driving a 1995 Saturn northbound on Lakeview Drive approaching Widgeon Way.
As she was traveling uphill the roadway curved to the left. For unknown reasons, Manka allowed her vehicle to drift off of the roadway to the right, Tanguay said.
He said Manka's vehicle broke through a wire-mesh fence and dropped down a steep embankment more than 10 feet high, with the vehicle overturning and landing on its roof.
Neither alcohol nor drugs appear to be a factor in the collision, said Tanguay.
Tanguay said CHP Officer Nick Powell is investigating the crash.
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