Manchester Whitewater Park sits on the Maquoketa River right in town at Howard & Helen Shelly Memorial Park, built around six stacked drops of about 18 inches each spread across more than 800 feet of channel. It's donor-funded and completely free to use, open 24/7 year-round since the city doesn't close the river and the state isn't likely to either. There's no gear rental on site, so bring your own kayak, paddleboard, or tube, and plan to walk the paved trail back up or float on down and arrange a shuttle. It's a mellow, beginner-friendly setup that's grown into one of the bigger whitewater parks in the Midwest for a town this size.