Lacey-Keosauqua State Park is a 1,653-acre recreation area on the Des Moines River in southeastern Iowa, valued for both outdoor use and its historic landscape. Acquired by Iowa in 1920 from land once used as a large farm, it was first dedicated as Big Bend Park and renamed in 1926 for John Fletcher Lacey, a Civil War veteran, congressman, and conservation advocate. Federal relief programs in the 1930s and early 1940s shaped much of the park through landscaping, trails, bridges, cabins, and the dam and spillway that created its lake. Its preserved rustic-style districts and ancient Woodland burial mounds give the park significance from prehistory through Iowa’s conservation era.