To the west it adjoins the Riozinho da Liberdade Extractive Reserve.

The Igarapé Tarauaê, a tributary of the Gregório River, rises in the forest and flow to the northeast.

[1] The consultative council for the Rio Gregório State Forest complex was created by decree on 19 September 2008.

[3] As of April 2012 there were 422 families in the Rio Gregório Forest Complex, which covered 480,000 hectares (1,200,000 acres) in total.

The state's Department of Industry, Trade and Sustainable Services (SEDENS) had a number of plans for the complex.