Huilo-Huilo Biological Reserve (Spanish pronunciation: [ˈwilo ˈwilo] audio , Pronounced: /ˈwiːloʊ ˈwiːloʊ/ WEEL-oh-WEEL-oh) is a private for profit natural reserve and ecotourism project in southern Chile. The reserve was created in 1999 and includes 600 km2 (232 sq mi) of native forest in Chile dedicated to wildlife conservation and tourism. The reserve is owned by the businessman Víctor Petermann who bought it in the 1990s, and was prior to the land sellings of the late Pinochet dictatorship part of Complejo Forestal y Maderero Panguipulli.
The history of the area around Huilo-Huilo has been divided in the following periods: