Lake Apo Lake Apo Lake Apo is a crater lake in Barangay Guinoyoran in the city of Valencia in Bukidnon province in the Philippines. It is located in a hilly area about in elevation, about WSW of the city "poblacion" (town center). Lake Apo was awarded the cleanest inland body of water in Northern Mindanao Region (Region X) in the late 1990s. The green body of water has an estimated area of with maximum depths reaching up to . The name of the lake come from the bisaya term "apo", meaning elder or grandparent. According to legend, there was a man living
Mount Apo of ; with two peripheral areas of and as buffer zones, provided for its management and for other purposes. Although a declared a Natural Park, the current climbing trails are littered with rubbish by irresponsible climbers, opening paths for soil erosion across the already denuded mountain sides. Some mountain and social climbing groups conduct climbs after the Holy Week/Easter, the peak climbing season, to clean the affected areas. In 1987, the National Geographic Society based in Washington, DC in the United States, published a book entitled, ""Our World's Heritage"", where Mount Apo was noted as a 'site of Word Heritage