Miller Peak Wilderness, one of the most rugged, wildlife-filled areas in southern Arizona, lies between the city of Sierra Vista and the Mexican border in the southern half of the Huachuca Mountains. It is near the southern terminus of the proposed 750 miles of the north-south Arizona Trail. More than 170 species of birds have been spotted here, including 14 kinds of hummingbirds, as well as more than 60 species of reptiles and 78 species of mammals. Elevations range from 5,200 feet to 9,466 feet atop Miller Peak, the highest and southernmost peak in the United States. Once cloaked in pine and fir, this land was devastated by forest fires and has been predominantly converted to oak and grass vegetation.
Many sheer cliffs rise hundreds of feet above the canyon floors.
At least 21 trails, many well maintained, lead through the Wilderness from its eastern, western, and southern boundaries. The Crest Trail reaches the top of Miller Peak. Throughout the area visitors may encounter evidence of the region's bygone mining and ranching days.