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2021 Map of Otay Mountain

Name: 2021 Topographic Map of Otay Mountain
Creator: U.S. Geological Survey
Published: 2021
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2021

About this map

The San Ysidro Mountains dominate this borderland landscape, where the southern boundary of San Diego County meets the United States of America Estados Unidos Mexicanos international line. The terrain is defined by a series of steep drainages including Little Cedar Canyon, Sycamore Canyon, and Mine Canyon, which flow toward the southern valleys. High peaks such as Otay Mtn and Donohoe Mtn overlook the winding Tijuana River as it crosses the border.

Modern infrastructure and historical pathways intersect at Doghouse Junction, providing access to the higher elevations via the Otay Mountain Truck Trl. Local water sources are noted throughout the arid ridges, including Echo Spring, Donohoe Spring, and Lupe Spring. The southeastern corner transitions into Marron Valley, where Cottonwood Cr and Dulzura Cr meet, served by local routes like Marron Valley Rd and the Lupe Spring Trl.