It covers an area of 16,000 hectares (40,000 acres) and is at an altitude of 4,000 metres (13,000 ft) above sea level.

The reserve was created in 1980, under Provincial Law Nº 3,749/80, aiming to preserve the steppe environment and its lagoon, including the region's typical fauna.

During the summer, it is visited by migrating birds such as the Wilson's Phalarope (Phalaropus tricolor) and the Baird's Sandpiper (Calidris bairdii).

[1][3][6][7][8] The vegetation of the reserve is sparse, characterized by tolilla (Fabiana densa) and chijua (Baccharis boliviensis) shrubs, and grassy pasture regions with Festuca orthopedica.

[1] Pozuelos Lagoon has alkaline saline water, with a maximum depth of 1 meter and occupies an area of 7,000 hectares (17,000 acres), but its size increases and decreases seasonally.