Golden Gate - Milagra Ridge - Pacifica, CA - National Parks (U.S.) on Waymarking.com

From the Golden Gate Parks Conservancy website:

Milagra Ridge’s scrub-covered ridgeline runs east to west, offering impressive views of the cliffside town of Pacifica, the ocean, and the coast. The scenic amble along Milagra Ridge can be a walk through history: First used by native Ohlone people, this land was later claimed by Spanish settlers and Mexican rancheros. The U.S. Army installed a gun battery here in the 1940s, and during the Cold War built a Nike missile station on Milagra and nearby Sweeney Ridge. Remnants of post-World War II’s Battery Construction #244 and a Nike missile launch site dot the ridge. In 1987, Milagra Ridge became part of the Golden Gate National Recreation Area, and today is the focus of community efforts to restore the wildlife habitat and help ensure the survival of a number of rare and endangered species found within this national parkland.

Surrounded by urban development, Milagra Ridge forms what biologists call an “island ecosystem.” Here, wildlife is isolated from other habitats, feeding and migration corridors are compromised, and exotic species can easily invade. Despite this isolation, Milagra Ridge holds a surprising number of threatened and endangered species, including Mission blue and San Bruno elfin butterflies and the California red-legged frog. Milagra's proximity to urban development, its limited size, and its rare wildlife make it exceptionally sensitive to human disturbance. Visitors are required to stay on trails and pets must be leashed.