I'm traveling to San Francisco for business at the end of September. I'll be in the city all week and one weekend so I,d like to visit someone off the beaten path the weekend I arrive. I get in to SFO at 10:30 am Saturday morning and need to be in San Francisco Sunday night - so I have some time. I'd like to see a beach (I've never seen the pacific) as well as some of the trees. Any suggestions on destinations? I'm planning to rent a car when I arrive on Saturday morning and drop it off again Sunday night before heading into the city. Thanks in advance!