The Araucárias Biological Reserve (Portuguese: Reserva Biológica das Araucárias) is a biological reserve in the state of Paraná, Brazil.
It contains a sample of the Atlantic Forest biome, a remnant of the Araucária forest.
The Araucárias Biological Reserve is one of the last remaining areas in the Araucária forest with conservation potential.
It is home to endangered species and archaeological sites.
The area holds significant areas of floodplains, swamps and gallery forest.[2]
The reserve is a "strict nature reserve" under IUCN protected area category Ia.[3]