The Kinnickinnic River, known locally as the Kinni, is one of Wisconsin's premier trout streams flowing through St. Croix and Pierce counties. This 25-mile long spring-fed river originates from a series of springs upstream of Interstate 94 in central St. Croix County, flowing through the city of River Falls before eventually emptying into the St. Croix River at Kinnickinnic State Park. Renowned for its exceptional water quality and clarity, the Kinni supports one of the densest wild trout populations in the Midwest, with estimates ranging from 5,000 to 10,000 trout per mile. The river is recognized as a Class 1 trout water and designated as an Outstanding Resource Water by the Wisconsin Department of Natural Resources, making it a must-visit destination for anglers seeking quality trout fishing in a beautiful setting.