Unit 36B

Ruby Peak and the Pajarito Mountains dominate the central landscape and serve as excellent reference points for orientation and glassing. The Atascosa and Tumacacori ranges frame the eastern approaches; Black Mesa, Castle Rock, and Cobre Mountain provide additional navigation markers. Key terrain features include Apache Pass and Hells Gate Gap as travel corridors, plus numerous canyons—Tinaja, Wilbur, Tres Bellotas—that channel game and water movement.

Arivaca sits centrally as a staging point and reference; Sasabe and Nogales anchor the unit's edges.

Terrain spans from roughly 3,000 feet on the low desert floor to just over 6,400 feet in the scattered mountain ranges, with most country sitting in the 3,500-4,500-foot band. This low-elevation zone supports creosote bush, ocotillo, and palo verde flats broken by bajadas and rocky foothills. As you climb into the mountains—the Tumacacori, Atascosa, Pajarito, and San Luis ranges—you encounter sparse juniper, oak, and grassland where moisture permits.

It's open country overall; dense forest is minimal, and much of the hunting happens in transition zones between flats and ridges where terrain funnels movement.

Nearly 1,000 miles of roads crisscross the unit, providing substantial access. I-19 and AZ Highway 286 are major corridors; county and ranch roads penetrate into remote areas. Towns like Arivaca, Sasabe, Nogales, and Ruby serve as base camps.

Road density suggests moderate pressure, particularly near Arivaca and along the major highways. However, the unit's sprawling size and terrain complexity allow hunters to escape crowds by moving away from obvious roads and heading into canyon systems. Private ranches intermix with public land, requiring awareness of boundaries.

Unit 36B encompasses the borderland region between I-19 to the north and the U.S.-Mexico boundary to the south, stretching from Nogales eastward through Arivaca and Sasabe. The unit is defined by Interstate 19, Arivaca-Sasabe Road, and various county roads, making it relatively accessible despite its size. This is classic southern Arizona border country—part desert floor, part low mountain complex.

The landscape transitions from urban edge near Nogales to increasingly remote ranching and public land areas as you move west and south toward Arivaca.

Water is scattered but present if you know where to look. Ruby Lake, Aguirre Lake, and Mormon Lake are named water features, though reliability varies seasonally. The unit's network of springs—Leon Spring, Peña Blanca Spring, Atascosa Spring, Rock Water Spring, and others—provide more dependable options.

Numerous tanks and reservoirs (Marijuna, Rock Tank, Tequila, Coches, Turner, Saucita) dot the landscape. Seasonal washes including Alamito Wash, Wilbur Wash, Batamote Wash, and Arrieta Wash flow during rains. Water strategy requires pre-hunt scouting; reliable sources concentrate game and dictate hunting approaches.

Unit 36B supports diverse species across its elevation range: elk inhabit the higher mountain zones, particularly the Tumacacori and Atascosa ranges; mule deer and white-tailed deer use mid-elevation transitions and canyon bottoms; desert bighorn sheep occupy steep canyon country and peaks, especially around the Pajarito and San Luis ranges; pronghorn roam the open flats and bajadas; javelina frequent brushy draws and water corridors; mountain lion and black bear prey on mule and white-tailed deer throughout. Early season targets elk in high country; as temps drop, all species converge on reliable water and lower elevations. The key is water-focused hunting combined with route-planning to intercept animals moving between daytime and watering areas in this water-limited landscape.