Known for having good numbers of Coues deer, this unit borders Mexico and includes the Tumacacori Mountains and several other ranges. It also holds desert mule deer, which live mostly in flatlands and low hills that are classic Sonoran desert landscape.

This unit has Coues deer in the mountains and mule deer in the low desert hills and flatlands. Mearns quail are also common. Expect to see U.S. Border Patrol agents and keep your camp and vehicles secure because several illegal immigrants enter the U.S. here.

Grasslands, ravines and Sonoran desert are at low elevations. Hills and mountains vary from mildly steep to rugged and extremely steep. Hiking in some mountains can be strenuous, especially in hot weather.

Mesquite and grasslands along with Sonoran desert scrub and cactus are at low elevations. Oak, chaparral and ocotillo cactus grow at high elevations.

Most land is public. Road access is good, but some low-elevation roads are closed by private landowners, so plan to hike to reach some good hunting areas. Hunting is allowed on state trust land, Buenos Aires Wildlife Refuge and the Coronado National Forest.

Camping is allowed on Buenos Aires Wildlife Refuge as well as state lands and Coronado National Forest property. Lodging is in Nogales, Amado, Arivaca and Rio Rico. Pena Blanca Lake Campground, which is 18 miles northwest of Nogales, has bathrooms and water but no electricity. An undeveloped campground at Arivaca Lake has an outhouse. Campers are limited to nine days per calendar month. Keep your camp secure, several illegal immigrants hike through this unit.