The Region

The Redwood Chapter of the Sierra Club is a geographically vast region composed of six local groups and encompassing all or part of nine counties in Northwest California.
Lake Group      Mendocino Group      Napa Group
Solano Group   Sonoma Group
North Group
(Del Norte, Humboldt, Trinity and Western Siskiyou Counties)

Although the geography and environmental challenges vary, we share one of the most remarkable regions in the United States and are committed to amplifying the power of our 11,000+ members and supporters to defend everyone’s right to a healthy world. We're proud to be a part of the most enduring and influential grassroots environmental organization in the United States. 
Our Environmental Center office location: 55A Ridgway Avenue, Santa Rosa, CA  95402

Mailing Address: P.O. Box 466, Santa Rosa, CA 95402  Phone: (707) 544-7651   Call for hours.   

 Office directions:  55A Ridgway Avenue in Santa Rosa (west of the 101 freeway, two blocks north of College and 1 1/2 blocks west off Cleveland Ave, south of Coddingtown).