Mt. Parker Mountain Range (also known as Mt. Melibengoy) is one of the longest and highest mountain range in Tboli, South Cotabato.
It encompasses the areas of Baranggay Tudok, Dlanag and Salacafe in Tboli South Cotabato.
Mount Melibengoy is located 31 kilometers away from poblacion. On its crater lies Lake Holon or Lake Maughan.