Welcome to the Sierra Club - Wisconsin Chapter.
We are Wisconsin's voice for the nation's oldest, largest and most influential grassroots environmental organization. Our members include 18,000 of your friends and neighbors. Inspired by Wisconsin’s beautiful lakes, forests, rivers, and other natural features, we work together to protect our communities and the planet.
Looking to take action on the most pressing issues in Wisconsin?
Check out our Action Center!
Make a Difference for Wisconsin's Future!
Show activities between:
and
| When | Earliest: Latest: |
| What |
|
| Word or Phrase | Word or phrase to search for: |
| Leader | All or part of leader name to search for: |
Made all your selections above?
or
No Matching Activities Found
Processing please wait.
Loading
| Date | Activity (click title for full description) | Sponsor | Category | Type | Difficulty | Links |
|---|
Loading
Loading ...
Legend:
Outing
Team/Committee meeting 
Volunteer Event 
Activist event 
Multiple events (map only)
Show activities between:
and
Local News and Information
Clean Wisconsin, Sierra Club Take Legal Action to Defend Federal Air Pollution Safeguards
August 31, 2026
Clean Wisconsin, Sierra Club Take Legal Action to Defend Federal Air Pollution SafeguardsLast week, Clean Wisconsin and Sierra Club filed motions to intervene and for summarydisposition in a case at the U.S. Court of Appeals for the Seventh Circuit...
Enbridge’s Line 5 has another frac out as reroute challenge and intimidation concerns escalate
August 21, 2026
Another frac-out on Enbridge’s Line 5 reroute construction has been reported at Trout Brook in Marengo, Wisconsin. It is only the latest drilling spill to have occurred during reroute construction, following a 1,900 gallon spill earlier this summer...
Wisconsinites say no to data center gas plants
August 12, 2026
This summer, the Public Service Commission (PSC, the agency that regulates electric and water utilities), held public input opportunities about two proposed methane gas plants, which are sometimes called "natural gas plants" by industry who want to...