It protects the lower reaches of the Itaúnas River and a strip of marshes, dunes and beaches along the Atlantic coast of the north of the state.

[1] It protects a strip of the Atlantic coast from north of the town of Conceição da Barra, Espírito Santo, up to the border with the state of Bahia.

[2] On the beaches of Itaúnas and Riacho Doce, which extend for 25 kilometres (16 mi), the dunes reach 30 metres (98 ft) in height.

[6] The park contains 23 archaeological sites with traces of human settlements such as chipped stones, indigenous pottery and artifacts from the colonial era.

[4] Threats include illegal fishing, hunting, firewood extraction and fruit collection, the presence of domestic animals such as horses, dogs and oxen, and irregular occupation by squatters.