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 our priority issues?
⬅️ 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
Club support event 
Social event 
Activist event 
Multiple events (map only)
Show activities between:
and
Local News and Information
The Data is In: Widespread Disproval for Data Center Costs in Wisconsin
April 15, 2026
Hyperscale data centers have been making headlines across the state, and these proposals have triggered tiers of key political decisions at the state and local levels. While opponents have been visible and vocal about their concerns about huge power...
Participate in the Wisconsin Conservation Congress “Spring Hearing” Survey
April 9, 2026
You have an in-person opportunity for input on April 13, 2026 at 6 p.m. in each county in the state. Find the location for your county here.
Alternatively, input can be given online from 6 p.m. on April 13, 2026 through 6 p.m. on April 15, 2026....
International Beaver Day: Celebrate the Beaver – A Critical Wisconsin Keystone Species
April 7, 2026
International Beaver Day is observed every April 7th to raise public awareness of the ecological contributions made by this keystone species.
Beavers are one of the most powerful nature‑based solutions we have when it comes to climate change and...