The Lake Tarusan Kamang area is located in Jorong Babukik and Jorong Hallalang, Nagari Kamang Mudiak, Kamang Magek District, Agam Regency, West Sumatra. This lake is unique because it only contains water during certain seasons. One time it looks so vast, but in an unpredictable time, this lake can turn into a stretch of green meadow. When it becomes a lake, in the middle there is a kind of pile of soil that is not immersed in water, which the local people call Padang Doto. The disappearance of the lake water into the bowels of the Earth and appearing in the gaps of the green meadows, without being able to guess the time is thought to occur due to an underground river. As a karst lake, when groundwater rises, the passages under the limestone hill will spit water and cover