Duncan Creek originates in a large wetland complex east of New Auburn, Wisconsin, and flows through agricultural lands before entering the Chippewa River in Chippewa Falls. The stream is a Class I brook trout water, known for its naturally reproducing brook trout population. The water quality is considered good, though agricultural activities contribute a moderate level of nutrients. It's a low-gradient stream bordered by narrow wetland strips primarily composed of tag alder and reed canary grass. Four dams on the stream form Lake Como in Bloomer, Tilden Millpond in Tilden, and Glen Loch Flowage and Star Lake in Chippewa Falls. The stream offers excellent fishing opportunities in a picturesque rural setting with several managed public access areas.