The Griesmer site (La-3) is located on the Kankakee River in Lake County, Indiana, about a mile southeast of Schneider, in Northwestern Indiana. It is classified as a Prehistoric, multi-component site with Middle Woodland, Late Woodland and Upper Mississippian occupations. The deposits were not stratified, but observation of the types of artifacts present, together with radiocarbon dates, helped to define the sequence of occupations at the site.

The Upper Mississippian cultures were located in the Upper Mississippi basin and Great Lakes region of the American Midwest. They were in existence from approximately A.D. 1000 until the Protohistoric and early Historic periods.