Our Mission
Friends of Interstate and Straight Lake Parks is a non-profit organization established with the purpose of supporting, assisting, and promoting the Wisconsin Department of Natural Resources with interpretive, scientific, historical, educational, and related visitor services at Wisconsin Interstate and Straight Lake State Parks.
Give Big 2026! – Let’s Plant Some Trees
Planting a tree is more than conservation—it is a promise to the future. Each tree helps restore lost canopy, support wildlife, and strengthen the health of our parks. With your support, we are replacing trees lost to Emerald Ash Borer and renewing the landscape with new life. Together, we are planting hope and growing a stronger future for our parks.
A Wisconsin State Park System vehicle admission sticker is required on all motor vehicles stopping in state parks, forests and recreation areas.
Admission stickers can be purchased online or at most individual properties. (Remember, an annual pass is now valid for 12 months from the time of purchase.)
Celebrating 125 Years!
September 20, 2025 marked a special day for Interstate Park. Individuals from around the state and region came to help us celebrate this milestone!
The day was packed with history and programs throughout the park. Park visitors, DNR staff and Wisconsin Governor Tony Evers participated in the day’s festivities. Events included nature journaling, learning to rock climb, guided hikes on the Pothole Trail with the Traprock Chapter of the Ice Age Trail, History of the Wisconsin State Park System, the history of the Silverbrook Mansion, the Civilian Conservation Corp (CCC) and so much more!
The year’s not over, and there’s still more to come. Watch for information on our Annual Meeting and Fall Festival in October!
A few photos from the 125th Celebration!
Check out our latest posts…
Follow us on social media for the latest updates! Our Facebook feed is below.
Friends of WI Interstate State Park and Straight Lake State Park
We are a non-profit organization established to support the park's naturalist program in its efforts to increase public awareness and appreciation of the park's natural and cultural history.
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A special Thank You to our community partners who’s generosity and support help us deliver outdoor educational and recreational activities throughout the year.
