About 90% of this unit is north of the Tohono O'odham (Papago) Indian Reservation just west of Tucson. A smaller section is south of tribal land. Bighorn sheep and a small herd of desert mule deer live here.

Desert mule deer are scarce in this mostly flat desert just outside Tucson, but some bucks get old enough to grow nice racks. Physically easy hunt that offers a chance at a quality desert bighorn sheep. Expect good late season bowhunting during the rut.

Unit 37A is mostly flat, but a few small mountains rise above the lowlands. Hunting is not physically difficult for hunters, but weather can be hot.

BLM and state lands are public and open to hunting. Much land in the east is private and closed to public access.

Lowlands are Sonoran desert with desert scrub, cactus, ironwood and creosote. Desert grasslands with mesquite can be found in middle and high elevations.

Camping is allowed on BLM and state lands. Lodging is in Coolidge, Florence, Tucson and Marana. Picacho Peak State Park has tent and RV campsites about 40 miles northwest of Tucson.