Description - The system of grasslands, cienegas, riparian streams and desert mountains found at Buenos Aires NWR provide habitat and travel corridors for a wide variety of wildlife that includes over 300 species of birds and southwestern mammals that include deer, pronghorn, javelina, coati, ringtail cat, mountain lion, badger and occasional jaguar. The refuge is an excellent birding destination with many of the border Arizona specialty birds like gray hawk, buff-collared nightjar, thick-billed kingbird, and Strickland's woodpecker.
The refuge is open to public use 24 hours a day. Headquarters Visitor Center: 7:30 am to 4:00 pm seven days a week. (closed Thanksgiving, Christmas, and New Year’s Day). Headquarters business office: 7:30 am to 4:00 pm Monday through Friday. Visitor center is closed weekends June 1–August 15.
Endangered species include masked bobwhite, pima pineapple cactus, kearney bluestar, jaguar, and peregrine falcon. The refuge also has the westernmost population of Chiricahua leopard frog and one of two U.S. populations of Underwood's mastiff bat.
Recreation - Recreational activities include wildlife viewing, camping, hiking, horseback riding and hunting.
Climate - You can expect mild winters with warm days (60° to 70°) and cool nights (around 40°). Summers can be extremely hot with daytime temperatures of 100° to 115° and evening lows in the 80s.
From Tucson, go west on Ajo Way (Highway 86) to Three Points. Refuge headquarters are located 38 miles south of Three Points off highway 286. Information and trails are located near Arivaca and can be reached by taking I-19 south from Tucson to the Amado/Arivaca exits. Exit west, turn right at the T, and then left at the Cow Palace onto Arivaca Road. Proceed west for 20 miles to Arivaca. Trails are located both east and west of town.