Horseshoe Lake State Park is an Illinois state park in Madison County, Illinois, United States. It is approximately 2,960 acres (1,198 ha) and surrounds a large horseshoe shaped lake called Horseshoe Lake. Horseshoe Lake is the second largest natural lake in Illinois taking up approximately 2,400 acres (971 ha) of the 2,960-acre (1,198 ha) park. The park has connections to Madison County...