- The Signal Hill Petroglyphs are located on a small rocky hill in Saguaro National Park West - The site features over 200 prehistoric Native American petroglyphs that are estimated to be between 550 and 1550 years old - The petroglyphs are easy to spot on the boulders that crown the hill, which is accessible by a well-signed trail that begins at the Signal Hill Picnic Area - The trail is less than 0.5 miles roundtrip and is considered one of the park's best easy trails to ancient petroglyphs - It is unknown whether the petroglyphs were religious symbols, directional signals, or simply decorative. - The petroglyphs include abstract geometric and spiral designs, as well as depictions of animals and people www.nps.gov/articles/000/signal-hill-petroglyphs.htm Map