| San Ysidro Mountains | |
|---|---|
| Otay Mountains | |
.jpg)  The Cerro San Isidro (top) and Otay Mountain (bottom) | |
| Highest point | |
| Elevation | 3,568 ft (1,088 m) NAVD 88[1] |
| Geography | |
  San Ysidro Mountains location of San Ysidro Mountains in California[2] | |
| Countries | United States and Mexico |
| State(s) | California and Baja California |
| District(s) | San Diego County and Tijuana Municipality |
| Range coordinates | 32°35′48.212″N 116°49′24.075″W / 32.59672556°N 116.82335417°W |
| Parent range | Peninsular Ranges |
| Topo map | USGS Otay Mountain |
| Biome | California chaparral and woodlands |
The San Ysidro Mountains are a mountain range in southern San Diego County, California,[2] and Baja California, Mexico. The mountains are a rugged coastal foothill range of the Peninsular Ranges system. Major peaks include the highest summit of the range, Otay Mountain, and the Cerro San Isidro which forms the southern extrusion of the range on the Mexican side of the border. The majority of the range is within the Otay Mountain Wilderness area, in the United States.
- ^ "Otay". NGS Data Sheet. National Geodetic Survey, National Oceanic and Atmospheric Administration, United States Department of Commerce. Retrieved 2021-09-19.
- ^ a b "San Ysidro Mountains". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved 2009-05-04.