2012 Map of Cucamonga Peak

About this map

Alta Loma and Etiwanda anchor the southern base of the San Gabriel Mountains, where residential expansion meets the high-elevation wilderness of the San Bernardino National Forest. The transition from the suburban grid of Grapeland to the steep canyons above is sudden, marked by significant drainages like Deer Canyon and Day Canyon Wash. In the northern highlands, the landscape is defined by massive peaks including Cucamonga Peak, Ontario Peak, and Bighorn Peak, connected by high-altitude crossings such as Icehouse Saddle.