Clear Lake Site is an archaeological site located in Sand Ridge State Park 6.5 miles (10.5 km) from Manito, Illinois. The site was occupied for the majority of the period from 500 B.C. to 1500 A.D.; cultures which have occupied the site include the Early Woodland, Havana Hopewell, and Mississippian. The site consists of a village area and two burial mounds. University of Chicago archaeologists conducted the first excavations at the site in 1932.