It protects an area of Atlantic Forest in a region that has lost most of its forest coverage over the last century, and protects the endemic endangered black lion tamarin The Morro do Diabo State Park is in the municipality of Teodoro Sampaio in the Pontal do Paranapanema region, 687 kilometres (427 mi) from the state capital of São Paulo.

The park lets visitors have direct contact with nature in a sustainable manner, and supports environmental education and scientific research.

[1] The park would be part of the proposed Trinational Biodiversity Corridor, which aims to provide forest connections between conservation units in Brazil, Paraguay and Argentina in the Upper Paraná ecoregion.

It has a large reserve of Aspidosperma polyneuron (Portuguese: peroba-rosa) trees, important for reforestation and recovery of degraded areas.

[3] European occupation of the Pontal do Paranapanema region began in earnest when the Sorocabana Railway reached the Paraná River in 1917.