Choteau Creek is a tributary of the Missouri River that flows through Charles Mix County and Bon Homme County in southeastern South Dakota. The creek is approximately 42 miles long from the town of Wagner to its confluence with Lewis and Clark Lake on the Missouri River. This warm-water stream is characterized by a highly variable flow regime and periodically elevated turbidity levels, especially during high flow events. The watershed encompasses around 375,000 acres, with land use predominantly agricultural consisting of 45% grass, 40% row crops, 7% small grains, 6% developed areas, 1% forested, and 1% water and wetlands. The creek experiences seasonal variations in water quality and flow, presenting diverse fishing opportunities throughout the year.