Travel Note
If you're not renting a car the Marin Airport is a great way to get from SFO to Marin! It will pick you up right outside baggage claim and drop you off in multiple locations within southern Marin. It also runs fairly regularly!
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Travel Note
There are lots of great Airbnbs in Marin!
Travel Note
West Marin has a awesome shuttle called the Stagecoach that will get you all over from Mill Valley to Stinson beach to Inverness!