It is located in northeast state of Piauí, between latitudes 8° 26' 50" and 8° 54' 23" south and longitudes 42° 19' 47" and 42° 45' 51" west. It falls within the municipal areas of São Raimundo Nonato, São João do Piauí, Coronel José Dias and Canto do Buriti. It has an area of 1291.4 square kilometres (319,000 acres). The area has the largest concentration of prehistoric sites in the Americas. Scientific studies confirm that the Capivara mountain range was densely populated in the pre-Columbian Era.