Três Barras National Forest, National forest in Santa Catarina, Brazil.

Três Barras National Forest covers 4,383.33 hectares in the municipality of Três Barras, Santa Catarina. It is a federal sustainable-use conservation unit managed by ICMBio, combining plantations of Araucaria angustifolia and Pinus elliottii with areas of mixed ombrophilous forest, floodplain fields and riparian woods of branquilho.

The area was first established as a forest station in 1944 and later designated as a national forest in 1968 to protect these woodlands. Between 1957 and 1981, systematic tree planting programs were carried out to restore and manage the forested landscape.

The forest functions as an educational center where students and researchers study environmental conservation methods and sustainable resource management techniques.

Visits are arranged in advance: bookings are made by phone at (47) 3624 2962 or 3624 0423, or by email at flonatresbarras.sc@icmbio.gov.br. The forest receives about 4,000 visitors a year, mostly school groups, university classes and researchers. Access is from the municipality of Três Barras, in the Planalto Norte of Santa Catarina.

Between 1945 and 1957 the Rio dos Pardos station planted 634 hectares of Araucaria angustifolia, and Pinus elliottii followed on 1,327 hectares from 1957 to 1981. Field surveys over two decades recorded 53 mammal and 181 bird species here, seven of them threatened, including the maned wolf and puma.