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
Observations in Nature Walk
July 8, 2026
Join us for a morning ramble through the University of Wisconsin Arboretum
Line 5 Reroute Update
July 7, 2026
This virtual event will get you the latest updates on Sierra Club's opposition to the Enbridge Line 5 pipeline
Madison Volunteer Night
June 25, 2026
Interested in helping the Sierra Club achieve local progress? Start here!