The Chapada das Mangabeiras is a mountain range in central

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

. The range runs northwest–southeast, and separates the basin of the

Tocantins River The Tocantins River ( pt, Rio Tocantins, link=no , , Parkatêjê: ''Pyti'' ɨˈti is a river in Brazil, the central fluvial artery of the country. In the Tupi language, its name means " toucan's beak" (''Tukã'' for "toucan" and ''Ti'' for "beak ...

to the southwest from the upper basin of the Parnaiba River to the northeast. The range also forms the boundary between Tocantins state and the states of

Maranhão Maranhão () is a state in Brazil. Located in the country's Northeast Region, it has a population of about 7 million and an area of . Clockwise from north, it borders on the Atlantic Ocean for 2,243 km and the states of Piauí, Tocantins a ...

and

Piauí Piaui (, ) is one of the states of Brazil, located in the country's Northeast Region. The state has 1.6% of the Brazilian population and produces 0.7% of the Brazilian GDP. Piaui has the shortest coastline of any coastal Brazilian state at 66& ...

. The highest points of both states are located there. The points are unnamed locations, one measuring 804 meters (Maranhão), and the other, 860 meters (Piauí).Piauí Tourism Portal

References

Mangabeiras Landforms of Maranhão Landforms of Piauí Landforms of Tocantins Highest points of Brazilian states {{Maranhão-geo-stub