This document discusses the peopling of the Americas based on evidence from archaeological sites in the Great Plains region. It describes early Paleoindian sites such as Folsom and Clovis sites that date back over 11,000 years. Some sites in the Great Plains, including the Kanorado locality in Kansas, contain artifacts and deposits that may predate Clovis culture and indicate human presence prior to 11,500 years ago. Further systematic study of pre-Clovis age deposits is needed to better understand the early colonization of the Great Plains.