Black Mountain (Pima County, Arizona)

A lava-capped mesa in Pima County, Arizona, rising 305 m above its base to an altitude of 1,128 m. Atop the mesa lie the ruins of an ancient Hohokam fortification dating to approximately AD 300-1500, featuring long stone walls, circular stone rings, petroglyphs, man-made trails, and pottery sherds. The Hohokam were master desert dwellers who built sophisticated canal systems and are the ancestors of the modern Tohono O'odham people. The site is located on reservation land and is not open to the general public, preserving these archaeological remains from disturbance.