Patagonia Mountains the Sonoran town of San Lazaro. The old mining camps and ghost towns of Mowry, Washington Camp, Harshaw, and Duquesne are located in the Patagonia Mountains. Nogales, Arizona, and Nogales, Sonora, are in the valley to the southwest of the mountain range. The San Rafael Valley and Canelo Hills are to the east of the Patagonia Mountains. The connected Santa Rita, Patagonia, and Sierra San Antonio ranges are part of the Madrean Sky Islands ecoregion, the sky island mountain ranges region on the north of the Sierra Madre Occidental, the major cordillera and mountain ecoregion of central-western and northwestern Mexico.
Arizona/New Mexico Mountains ecoregion other outlier ranges considered part of the Arizona/New Mexico Mountains ecosystem. Arizona/New Mexico Mountains ecoregion The Arizona/New Mexico Mountains ecoregion is a Level III ecoregion designated by the United States Environmental Protection Agency (EPA) in the U.S. states of Arizona and New Mexico. The region is a transition region from the lower elevation Sonoran Desert (81) to the southwest and Chihuahuan Desert (24) southeast; the west is bordered by the mid elevation Mojave Desert (14). The north is bordered by the east-west "Arizona/New Mexico Plateau" (22), ecoregion which is part of and is the southern region of the Colorado Plateau.