The Old Cordilleran Culture, also known as the Cascade phase, is an ancient culture of Native Americans that settled in the Pacific Northwestern region of North America that existed from 9000 or 10000 BC until about 5500 BC. The culture possibly spoke a Macro-Penutian language (a hypothetical macrofamily which may include Penutian, Uto-Aztecan, and some other language families). This culture also created the oldest attested examples of art in the Pacific Northwest.