Arroyo Seco is an unincorporated community in Taos County near Taos, New Mexico, United States. Arroyo Seco's economy is based on tourism and services to residents of retirement and vacation homes. Arroyo Seco's annual Fourth of July parade is locally popular.Arroyo Seco a land area of 53.63 sq. miles, a water area of 0.05 sq. miles, and a population density of 24.43 people per sq. mile at Census 2000. Arroyo Secos's elevation is 7,634 feet.