The Buenos Aires is an 115,000-acre refuge established to preserve the endangered masked bobwhite quail. The refuge contains extensive grasslands and seasonal streams and a lake. It also is home to 300 species of birds, including hawks, herons, gray hawks, vermilion fly catchers and golden eagles (during migration). Other wildlife includes coyotes, deer, foxes, and pronghorn antelopes. Popular trails are located on the eastern side near the town of Arivaca.
The wildlife refuge is open daily from dawn to dusk.
