This biological reserve was created by Supreme Decree Nº 22721 on January 30, 1991 to preserve the ecosystems of the protected area, the endangered flora and fauna, the sources of water for the city of Tarija and nearby communities. To preserve the Tajzara basin which is the only RAMSAR site in Tarija, to guarantee the sustainable use of natural resources and improve the quality of life of the population.
It has an area of 108.500 hectares of which about 43% of its area corresponds to Puna grassland and the rest is divided between dry inter – Andean forest and the Tucuman – Bolivian forest