This document presents the first major study of the prehistory of North Park, the northernmost of the three intermontane basins in Colorado. The archaeological investigations were conducted by the University of Colorado for the Bureau of land Management to determine areas suitable for leasing and mining coal. These data have also provided baseline information for the preparation of a land use plan encompassing North Park. Investigations conducted in 1977 and 1978 reveal a long and rich prehistory in North Park, where a number of prehistoric cultures utilized the natural resources available in this region. The record of these peoples is a valuable and fragile legacy of their efforts to survive in a harsh environment.