The Agate Bluff Archaeological Site is a collection of four Late Prehistoric rockshelters located in a large bluff in northwest Weld County near the Wyoming border. In 1951–52 siblings Cynthia and Henry Irwin excavated the rockshelters and determined…

Located about twenty miles south of the South Platte River in northeast Colorado, the Donovan Archaeological Site is a Late Prehistoric bison-processing area with evidence of multiple Upper Republican occupations between about 1000 and 1300 CE. The…

An earth lodge is a distinctive type of timber-frame house built from the early 1400s to the late 1800s by a dozen different Indigenous nations on the Great Plains. These massive circular structures, often encompassing 1,500 square feet or more, featured…