Willow River State Park in Hudson, Wisconsin Post author: Post published: Post category:Hike / Hudson / North America / USA / Wisconsin Waterfalls, caves, and frogs for these little explorers. A great day outdoors at Willow River State Park in Wisconsin! You Might Also Like Hiking Minnesota: Palisade Head & High Falls in Tettagouche State Park Summer in England: Afternoon Tea at The Abbey Hotel & Church of St. James in Southstoke in Bath Published in St. Croix Valley Magazine: Enjoy the Best of the Midwest This Summer