On this site you will find access information about SF Bay Area parks I've explored or tried to explore, intended to help other wheelchair users tell whether they want to try them. They range from 100% ADA accessible with good public transit to the kind of perverse undertakings that may make you roll your eyes--unless you have been frustrated looking for information about undesignated but useable trails.
Map View
San Francisco Bay Area Wheelchair Accessible Trails Specialties