...car.? Someone mentioned to me a while back about a hike in Marin, CA where you start hiking where you park your car, hike a few miles to the beach or coast. and then can take a shuttle back to the parking lot.

Can anyone give me more details about this place?
Like where is the parking lot?
What are my options for taking the shuttle back to the parking lot?
How much is the shuttle?

And links would be super helpful!

Thank you