Atleast 1,200 years according to researchers at Canyonlands National Park. Discoveries of bowls in Utah and Colorado contain the oldest traces of cacao found in North America. Artifacts at Mesoamerican excavation sites have long shown chocolate enjoyment for almost 4,000 years. Since cacao grows in low altitude regions 20 degrees north and south of the equator, this provides evidence of trade between early peoples of the Southwest US and areas of southern Mexico.