Who was the large first American culture groups resides in Chaco canyon?

The large cultural group that resided in Chaco Canyon was the Ancestral Puebloans, also known as the Anasazi. They flourished in the region from around AD 900 to 1150, developing a complex society characterized by impressive stone architecture, extensive trade networks, and astronomical alignments in their construction. Chaco Canyon served as a major center for commerce, politics, and spirituality during this period. Their influence extended throughout the southwestern United States, leaving a lasting legacy in Native American culture.