Otay Mountain Wilderness

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Otay Mountain Wilderness is a protected area in San Diego County, California, about 12 miles east of Otay Mesa and just north of the U.S.–Mexico border. The land covers about 16,885 acres (6,833 hectares) and was designated as wilderness in 1999. It is managed by the Bureau of Land Management.

Geography and landscape: The terrain rises from near sea level to the summit of Otay Mountain, which reaches about 3,566 feet (1,087 meters). The San Ysidro Mountains feature rugged canyons and steep hills, creating a remote, largely undisturbed area with several key habitat types, including chaparral and coastal sagebrush.

Plants and animals: Otay Mountain hosts a diverse plant life, including the world’s largest stand of Tecate cypress and at least 15 species that are candidates for federal listing as threatened or endangered. The California Native Plant Society lists 37 plant species as sensitive, with at least five found only in this area. Large mammals like mule deer are common, along with several species of special concern.

Conservation and border issues: The wilderness lies near the Mexican border and is part of San Diego’s multi-species conservation plan. In the 1990s, border wall construction began nearby as part of Operation Gatekeeper. An environmental study warned that building the wall and related roads could harm plants, animals, and water systems. Construction through the wilderness continued starting in December 2008 under the Secure Fence Act, affecting habitat and animal movement.