Painted Rock Mountains The Gila River crosses all of southern Arizona from southwest New Mexico, and is the drainage for about 1/2 of Arizona (the south). The highest elevation in the mountains is "unnamed" at , and is located at the central & east region of the range. (The range has many northwest-by-southeast ridgelines.) Painted Rock Mountains The Painted Rocks Mountains are a short 15-mile (24 km) long mountain range of the north-central Sonoran Desert southwest of Phoenix, Arizona and in southwest Maricopa County. The Gila River flows through the central-north end of the range. The famous Painted Rock Petroglyph Site lies at
Chumash Painted Cave State Historic Park to possibly 1000 years or more. There is also evidence of graffiti beginning with early white settlers, which eventually led to creation of a protective physical barrier and State Historic Park status. In 1972 it was added as Site #72000256 on the National Register of Historical Places. Access is from State Route 154 about north of U.S. Route 101 in the San Marcos Pass in the Santa Ynez Mountains, on Painted Cave Road. The cave is adjacent to the left side of this narrow one-lane mountain road, with a slightly widened shoulder that provides parking for one or two vehicles.