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.
Transverse Ranges are at high elevations, with Cajon Pass being at a modest 4,190 ft (1,277 m) above mean sea level; this means that snow is less of a factor here than in the moderate to high mountain passes to the north like Donner Pass. Still sometimes, heavy snowfall can snarl traffic on Tejon and Cajon Pass, the higher two of the three freeway passes. I-5 and I-15 commonly experience heavy traffic over their mountainous route across these mountains. Transverse Ranges The Transverse Ranges are a group of mountain ranges of southern California, in the Pacific Coast Ranges physiographic region in North