One of southern Arizona’s most prominent petroglyph sites is Signal Hill in the Tucson Mountain District of Saguaro National Park. This location features over 200 petroglyphs created by the Hohokam (the predecessors to today’s Akimel O’odham and Tohono O’odham tribes). The exact dates have been difficult to establish, but archeologists believe the petroglyphs were first etched sometime between 550 and 1550 years ago. The designs, which were created by pecking into the desert varnish coating the rocks on the hills, feature depictions of people, animals including bighorn sheep, snakes, and…
