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
Colorado Desert Colorado Desert California's Colorado Desert is a part of the larger Sonoran Desert. It encompasses approximately , including the heavily irrigated Coachella and Imperial valleys. It is home to many unique flora and fauna. The Colorado Desert is a subdivision of the larger Sonoran Desert encompassing approximately The desert encompasses Imperial County and includes parts of San Diego County, Riverside County, and a small part of San Bernardino County. Most of the Colorado Desert lies at a relatively low elevation, below , with the lowest point of the desert floor at below sea level at the Salton Sea. Although the