Silverwood's founding in 1965 followed a pattern common to mid-century conservation efforts: a benefactor, a parcel of land, and an organization willing to take on the task of managing it. Harry Woodward donated the initial 85 acres to the San Diego Audubon Society, whose members recognized the site's value — a working slice of Southern California's native ecosystem within reach of the urban population that needed to understand it. The sanctuary grew over the decades through additional acquisitions to 785 acres. It accumulated a documented flora of 340 plant species and 160 bird species. Kumeyaay archaeological artifacts found on the property connected the site to the people who had inhabited these hills for centuries before European settlement. By 2003, Silverwood had become both a nature preserve and an educational institution.

Chaparral is a fire-adapted ecosystem — a fact that is both true and insufficient comfort when standing in the ash. The plants that characterize Southern California's inland slopes evolved alongside fire: they burn intensely, leave seeds that require the heat to germinate, and begin regrowing within the same wet season the fire occurred. The recovery at Silverwood followed this pattern. Within months, ceanothus and laurel sumac had begun pushing up through the char. Birds returned as soon as there was cover. The native plant demonstration garden, which had documented the ecological character of the site's vegetation, was rebuilt as an opportunity to re-establish species that might otherwise take decades to return naturally. By 2008, five years after the fire, Silverwood was open again. The sanctuary that emerged was not identical to the one that burned — fire recovery is not a reset — but it was recognizably itself.

Silverwood's 785 acres occupy terrain that transitions from oak woodland in the canyon bottoms to coastal sage scrub and chaparral on the exposed ridgelines. The elevation provides a moderating effect: cooler than the city below in summer, occasionally cold enough for frost in winter. This thermal range supports species diversity that flatter terrain cannot. The sanctuary's bird list, which covers 160 documented species, reflects both the resident population of chaparral specialists and the migratory birds that move through the region each spring and fall. The Kumeyaay archaeological presence on the property is documented but not publicly identified, a standard practice for protecting sites from disturbance. The Frank F. Gander Nature Education Center, rebuilt after the fire, runs school and community programs that connect the urban San Diego population to terrain that exists thirty minutes from downtown but operates on entirely different ecological time.