Thanks to its restrained development patterns and aggressive preservation campaigns, Marin County has small suburban developments tucked directly against impressive preserves and open spaces nearly everywhere. Though getting to the county from elsewhere can be difficult by transit, once there, the local Marin Transit bus system provides fantastic access to nearly everywhere worth hiking.
Marin Transit maintains its own up-to-date list of transit routes to parks, including their own set of featured parks: check their website for more inspiration!