This 3,200 hectare lake was built on the Walnut River for flood control. It is also used for water supply and for recreational purposes.
The El Dorado State Park sits along the southern shores of the lake, offering boating, camping and hiking. Many also come to go fishing for walleye, crappie, largemouth bass and channel catfish.
There are swimming area within the state park, as well as an amphitheatre and picnic areas. The park also offers horseback riding and even has a horse campground.