Chama River below Abiquiu Dam with red sandstone cliffs & mesas; The Dam forms Abiquiu Lake, a 5,200-acre (21 km2) reservoir located in Rio Arriba County, in northern New Mexico; Water of the Rio Chama is impounded by the 1,800 feet (550 m) long by 340 feet (104 m) high, earth-filled dam which was completed in 1963, and later raised in 1986; The Rio Chama flows into the Rio Grande at Espanola; near Abiquiu, NM