The Four Lakes Group is your local branch of the Sierra Club. We are an all volunteer organization dedicated to environmental education and conservation. We are one of six Groups in the Wisconsin Chapter.
The Four Lakes Group area includes more than 3,500 members in the counties of Columbia, Dane, Dodge, Green, Iowa, Jefferson, Lafayette, Rock and Sauk.
See what activities we have planned on our Outings/Events calendar.
Thank you participants and volunteers at the Garden Expo and Canoecopia!!
The following are events sponsored and hosted by the Sierra Club Four Lakes Group, the Wisconsin Chapter and other Groups and Sections within Wisconsin. Get outside and get active!
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Local News and Updates
Falling into a jam-packed October
October 15, 2026
Fall is in full swing, and you can get involved with Sierra Club-Four Lakes Group in so many ways this month!
Take action on Line 5, celebrate Wisconsin’s wolves during Wolf Awareness Week, get outside and enjoy the beauty of the season, lend a...
Sierra Club's Adopted Highway Cleanup
September 20, 2026
We’ve adopted a section of highway and are looking for people to help out with our efforts to clean up and beautify nature
Willy St Fair Tabling
September 19-20, 2026
Join us to promote the Sierra Club at our Willy St Fair booth. It's a great opportunity to engage with a very receptive audience about our issues, let people know about our activities, and get people involved.