The Mackinaw River State Fish and Wildlife Area is a 1,448-acre (586 ha) state park in Tazewell County, Illinois. It is operated by the Illinois Department of Natural Resources (IDNR). The Area dates to 1970, when a conservation group based in Bloomington, the Parklands Foundation, donated its acreage to the state. (Ref: https://en.wikipedia.org/wiki/Mackinaw_River_State_Fish_and_Wildlife_Area)