The range is a narrow sub-range, and an extension north, at the northeast of the Hualapai Mountains massif, which lies to the southwest.

The east side of the Peacock Mountains are defined by due-north and due-south flowing drainages on the west of the Cottonwood Cliffs.

Another lower elevation community is the Semidesert Grassland, found especially in southeast Arizona, (middle elevation locales, Madrean Sky Islands region, Cochise County), but the zone extends northwestwards along the Arizona transition zone mountains and valleys, higher elevation grassland at the base of the northwest–by–southeast lineage of the Mogollon Rim, and associated ridges or plateaus (Mogollon Plateau); the Semidesert Grassland reaches its terminus northwest up the Big Sandy River and west to the Sacramento Valley at the west of Kingman, and northwards up into Detrital Valley.

Upstream up Truxton Wash to the northeast, is a region of Plains and Great Basin Grassland along the Truxton Wash and mountain foothills; further east and northeast, on the west of the Coconino Plateau, (Hualapai Indian Reservation, and Aubrey Valley region), a large mostly continuous expanse of the grassland exists.

Other exceptions are the highpoint communities of trees or alpine grasslands at the San Francisco Peaks region, or the Kaibab Plateau on the Grand Canyon North Rim, or a few other higher altitude locales.