The Pusch Ridge Wilderness Area forms much of the northern boundary of the city of Tucson, Arizona.
A mature Saguaro cactus on a ridgetop. This one is on the ridgetop between upper Pontatoc Canyon and looking north to the unnamed box canyon behind. This elevation is near the saguaro's upper limit, due to winter temperatures. In the 56K acre / 88sq mile Pusch Ridge Wilderness Area which forms much of the northern boundary of Tucson, Arizona in the Sonoran Desert.