The heavy rain Friday night caused the small creek that normally runs through and underneath the parking lot to flood.
It washed away the structures around it that normally contain it.
And then a waterfall was left behind from where the parking lot collapsed - close to where it meets Stinson Beach.
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"This is crazy, I'm always boogie boarding I've never seen anything like this, this much water, that's all washed out, it's unbelievable," Stinson Beach resident Ocean Nage said.
The official word from the Golden Gate National Recreation Area is that both Stinson Beach and Muir Woods were closed to the public because of the storm damage.
But people, at least at Stinson Beach, are definitely not steering clear.
It was still a pretty busy day at the beach.
The owner of Parkside Café was shocked by the damage which was impacting her business.
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