Badger Creek Watershed is one of the oldest publicly owned lakes in Iowa. A picnic and wetland tour to celebrate the lake will be held Saturday, July 14, from 5-8 p.m. at the Ron and Jenny McBroom barn, Winterset. The celebration is open to the public and includes a tour of the CREP wetland, the McBroom-Hargis barn, the Conservation Station and an evening dinner.