Friends of the Gualala River
- A group dedicated to protecting the Gualala River watershed and the species living within it.
- http://www.gualalariver.org/

Redwood Region Audubon Society
- Northwest California chapter of the National Audubon Society features announcements, articles, calendar of events, field notes and membership and contact information.
- http://www.rras.org/

North Coast Chapter California Native Plant Society
- A nonprofit organization of amateurs and professionals which is dedicated to the preservation of California flora.
- http://www.northcoastcnps.org/