2018 Map of Otay Mountain

About this map

Otay Mtn and the San Ysidro Mountains dominate this borderland terrain, where the international boundary separates the United States and Mexico. The landscape is defined by steep drainage systems such as Little Cedar Canyon, O'Neal Canyon, and Mine Canyon. Human presence is marked by isolated points like Doghouse Junction and the winding Minnewawa Truck Trail, which traverses the high ridges. In the lower elevations to the east, Marron Valley sits near the confluence of Cottonwood Cr and Tecate Cr, where they join the Tijuana River as it flows along the border. Scattered water sources including Donohoe Spring, Echo Spring, and Lupe Spring are vital markers in this arid environment, highlighting the challenging topography that historically dictated movement through these canyons.