The colonization of the Americas has been a major focus of archaeological research. The presence of highly mobile hunter-gatherers at ~11,200 B. P. was thought to represent the first appearance of humans on the landscape. This idea has been challenged by the discovery of several pre-Clovis sites across both continents that seem to have dates much older than 11,000 B.P. One example is the Chesrow complex in southeast Wisconsin. Evaluating the legitimacy of a pre-Clovis age for the complex would provide new evidence that could be incorporated into existing models for the migration and occupation of North America along with human impacts on the environment at the end of the late Pleistocene.