The Griesmer site on the Kankakee River in northwestern Indiana preserved evidence of repeated prehistoric occupation from the Middle Woodland, Late Woodland, and Upper Mississippian periods. Excavated in 1962 and destroyed by sand removal in 1967, it survives chiefly through the excavation record. Its most important remains date to about AD 1520 and 1530, when the riverbank was used as a seasonal late spring to early summer camp rather than a permanent village. Pits, post molds, plant remains, bones, mussel shells, and especially Fisher and Huber pottery make it a key source for understanding late precontact life in the Kankakee Valley and a very late Upper Mississippian presence in northern Indiana.