Once a state park, Painted Rock Petroglyph Site is now managed by the BLM, and is surprisingly popular, given its rather remote location in the southern Arizona desert, 11 miles from Interstate 8, on flat land close to the Gila River - popular in cooler times a year at least, but less so in summer when temperatures regularly exceed 110°F.
Centerpiece of the site is a low granite hill strewn with reddish basalt boulders on which are etched over 3000 petroglyphs - some individual boulders have dozens - spanning many centuries, approximately 200 to 1400 AD, plus a few inscriptions from more recent travellers, between the 18th and 20th centuries.
The rock art is from the Hohokam peoples and their predecessors, and site is approximately at the western edge of their range. There are several other major petroglyph sites in the vicinity, either side of the river, though others are either on private land or much harder to reach. The name painted rock implies pictographs rather than petroglyphs, and historical accounts do reference the presence of pictographs, however no trace remains today.
The other attraction of the site is a large campground, right next to the petroglyph hill - the sites are well separated and all have good views over the flat desert surroundings, dotted with saguaro and other cacti, with mountain ranges in the distance - the Gila Bend Mountains to the north, on the far side of the river, Oatman Mountain to the west, and the Painted Rock Mountains to the east.
Map of Painted Rock Petroglyph Site
The petroglyph site is reached by the paved Painted Rock Road, or Citrus Valley Road, and crosses farmland (partly used for solar arrays) and then sandy desert flats for ten miles, starting at I-8 exit 111. The last part of the approach is from the east, on what is now Rocky Point Road, and finally along short track to a parking place beside the hill. The campground to the south has 59 individual sites and two group areas, but no hook-ups or water supply. Day-use facilities are two shaded picnic ramadas and a 0.3 mile loop path around the petroglyph hill, which is fenced off at the base to protect the rock art, hence very few petroglyphs can be seen close-up.
Most of the petroglyphs face south or east, indicating that this was the usual direction of approach. The hill is about 20 feet tall with two distinct high points, and 300 by 130 feet in area. There are several historic trails in the facility, the oldest in use for several thousand years. The ancient petroglyphs are accompanied by inscriptions from pioneer travellers including Juan Bautista de Anza, 1775-1776, and the Mormon Battalion in 1846.