Marin 99s https://marin99s.org/
Civil Air Patrol, Squadron 23 https://www.facebook.com/CAPSQ23/
Angel Flight
CalDART
Girl Scouts — Aviation badges earned through a ground school and orientation tour hosted by the Marin 99s
Boy Scouts
EAA Young Eagles — introduction to aviation hosted by Experimental Aircraft Association chapters in the area (1232 at San Rafael Airport also here and 1268 at Sonoma Skypark)
Marin County Sheriff Air Patrol https://www.marinsheriff.org/about-us/field-service-bureau/air-patrol