Lake Apo and the volcanic field east of Pangantucan, Bukidnon ( to the west). Another small volcanic cone is located just southwest of 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 .
Mount Apo is said to be named after a nobleman named Apong, who was killed while mediating the battle between two suitors of his daughter Saribu. Apo is various local languages mean "grandfather", "master", "grandson", and "wise elder". On May 9, 1936, Mount Apo was declared a national park with "Proclamation No. 59" by President Manuel L. Quezon, followed by "Proclamation No. 35" of May 8, 1966, then "Proclamation No. 882" of September 24, 1996. On February 3, 2004, the approval of "Republic Act No. 9237" established Mount Apo as a protected area under the category of "natural park" with an area