Most of the 76-square-mile Catalina Island is a park, forever barred from development. In 1975, the Wrigley family transferred 85 percent of the island to the Santa Catalina Island Conservancy, a nonprofit foundation dedicated to preserving and protecting the open spaces, wild lands and nature preserves. That means that what's wild in Catalina today will remain wild. Avalon, the main settlement, has little room for expansion, so what's currently built is what will remain built