Rio Preto National Forest, a national forest in Brazil

Rio Preto National Forest is a federal conservation unit of about 2,830 hectares in Conceição da Barra, Espírito Santo. Its terrain is flat to gently undulating, cut by watercourses that form deep, narrow valleys. Most of it is Atlantic Forest altered by human activity, with 338 identified tree species and 58 hectares of Eucalyptus citriodora.

The protected area was established in 1990 by government decree to preserve remaining Atlantic Forest. Prior to this, the region had been intensively logged during the 20th century until eventually receiving legal protection.

The forest is open only to school groups that book visits in advance with the ICMBio administration, so it is used for environmental education rather than general recreation. Trails, lakes and a visitor centre support these guided activities, and the name Rio Preto refers to the dark river crossing the flat terrain.

Access to the administrative area is by 12 km of municipal road linking the BR-101 North (around km 27) to the Córrego do Artur community; the forest lies 56 km from Conceição da Barra and 260 km from Vitória. Visits are only for school groups and require prior scheduling with the ICMBio administration. The unit has trails, lakes and a visitor centre.

Despite past logging and fires, portions of the forest still look remarkably original, containing around 338 tree species. This makes it a living window into the region's past, allowing visitors to see how the landscape appeared before intensive use.