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The Arapahoe and Lost Creek Site is an unusually good representative of aboriginal settlement and subsistence in the arid interior basins of Wyoming. The site extends roughly nine kilometers along the terraces of Arapahoe and Lost Creeks in the northern portion of the Great Divide Basin. This archaeological site is a multi-component site containing late Paleoindian, Early Archaic, Middle Archaic, Late Archaic, Late Prehistoric and Protohistoric components, spanning a time period from roughly 9000 years ago up to perhaps 100 years ago. Surface inventory of the site disclosed numerous distinct activity areas, about three dozen hearth features, and numerous indications of buried components.