The Kinnickinnic River is located in Pierce and St. Croix Counties in Wisconsin. This spring-fed, cold-water stream begins just north of I-94 in the town of Warren and continues southwest through River Falls, the heart of the city and its downtown district to Prescott where it empties into the St. Croix River. The Kinni flows 22 miles and includes 174 square miles of watershed.
The watershed is characterized by scenic bluff lands, rare oak savanna, original prairie, farm land, white pine forest, wooded coulees, sedge meadows, plenty of open space and scenic vistas and is home to rare and endangered plant species. The Kinni is one of the few naturally sustaining trout fisheries in the Midwest and is classified as a Class 1 trout stream producing both brook and brown trout. Because of its natural and scenic beauty, residents and visitors enjoy the Kinni through fishing, kayaking, hiking, hunting, birding, and photography.