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A couple on the beach reportedly discovered Hernandez near the trail from Kirk Creek, nearly 200 feet down a cliff. Her vehicle was found partially in the water, according to officials.
Big Sur Fire, the CHP and Monterey County Sheriff responded to the scene.
They say she appeared to have a shoulder injury and was talking and could walk.
She says she has been there since July 6.
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The Monterey County Sheriff's Office says they were searching for Hernandez Friday around Highway 1 and Big Sur.
Her car was seen on a gas station surveillance camera south of Carmel last Friday morning.
Hernandez last spoke with her family earlier that morning after spending the night in Half Moon Bay.
The 23-year-old left Portland last week, bound for her sister's home in Lancaster in Southern California.