Interstate Park Established: Wisconsin’s First State Park Marks Centennial Plus
On September 20, 1900, Interstate Park was established along the Wisconsin-Minnesota border on the St. Croix River, becoming Wisconsin's first state park.
Madison, WI, September 20, 2026 —
September 20, 1900 – A significant moment in Wisconsin’s conservation history occurred on this day with the establishment of Interstate Park. Located along the scenic St. Croix River, which forms the border between Wisconsin and Minnesota, this park holds the distinction of being Wisconsin’s inaugural state park.
The creation of Interstate Park marked a forward-thinking approach to preserving natural landscapes for public enjoyment and ecological protection. Situated in Polk County, Wisconsin, and Washington County, Minnesota, the park spans both states, a unique feature emphasized by its name. The St. Croix River, a designated Wild and Scenic River, flows through the heart of the park, shaping its distinctive geological features and providing a vital habitat for diverse flora and fauna.
Among the park’s notable geological formations are the Dalles of the St. Croix, a series of rugged, pothole-like rock formations carved by glacial meltwater over thousands of years. These formations, including the iconic Devil’s Chair, have long attracted visitors interested in geology and natural beauty. The park’s establishment aimed to protect these and other natural resources from development and to ensure their preservation for future generations.
Interstate Park is divided into two units: the Wisconsin unit in St. Croix Falls and the Minnesota unit in Taylors Falls. The two units are connected by a bridge, facilitating access for visitors to explore the entirety of this shared natural treasure. The park’s creation was a collaborative effort, recognizing the shared value of the St. Croix River corridor by both Wisconsin and Minnesota.
As Wisconsin’s first state park, Interstate Park set a precedent for the state’s commitment to outdoor recreation and natural resource management. Its establishment over a century ago underscores a long-standing dedication to conservation that continues to shape the state’s park system today. The park remains a popular destination for hiking, camping, fishing, and enjoying the natural beauty of the St. Croix River Valley.
Story summarized from the original created by Jenna Sandy on www.wmtv15news.com, see more information here.
Media gallery
