Interstate State Park straddles the Minnesota-Wisconsin border, offering visitors unique opportunities to explore dramatic glacial potholes, scenic river views, and diverse outdoor recreation along the St. Croix River.
Interstate State Park is a distinctive state park located on both sides of the St. Croix River, spanning Minnesota and Wisconsin. It is renowned for its striking geological formations, especially the glacial potholes formed during the last Ice Age, which are large, deep depressions carved out by swirling meltwater and rocks. The park covers riverine landscapes, rugged sandstone cliffs, and forested hills, providing a mix of ecosystems that support a variety of wildlife including white-tailed deer, beavers, and numerous bird species. Established in 1895 on the Minnesota side and 1900 on the Wisconsin side, this park was the first interstate state park in the United States. It holds historical significance for preserving scenic beauty along the St. Croix River, a National Wild and Scenic River, which forms the natural boundary between the two states. Recreational opportunities are abundant in Interstate State Park, including hiking on trails that reveal panoramic river views and geological wonders, camping at developed campgrounds, rock climbing on exposed sandstone cliffs, fishing in the St. Croix River, and picnicking. The park also offers interpretive programs focused on geology and natural history. Key landmarks include the Glacial Potholes, the 1000 Steps Trail, and the St. Croix River itself. Visitors often come for both the outdoor activities and the chance to observe the unique glacial formations up close. The park’s access from both Minnesota and Wisconsin provides multiple entry points, making it a popular regional destination for families, rock climbers, anglers, and geology enthusiasts.
Rare glacial potholes carved during the last Ice Age
Scenic overlooks of the St. Croix River Gorge
Extensive sandstone cliffs popular for rock climbing
1000 Steps Trail descending to the river's edge
These cylindrical holes were formed by swirling meltwater beneath glaciers and are some of the largest and most accessible examples in North America.
A federally designated Wild and Scenic River that defines the park boundary, offering scenic beauty and excellent fishing and paddling conditions.
A steep stairway descending to river level, providing dramatic views of the cliffs, river, and potholes along the route.