Kinnickinnic State Park is a 1242acre Wisconsin state park in which the Kinnickinnic River joins the St. Croix River. The mouth of the Kinnickinnic River forms a sandy delta upon which boaters can picnic and camp.WildlifeWildlife that frequent Kinnickinnic State Park include whitetail deer, raccoons, mink, grey and red fox, and beavers. Over 140 species of birds visit the Kinnickinnic Valley.