It is high mountain comprised of sand and granite. The highest peak is Phureua. It is 1,365 meters high from the sea level. The other important peaks are Phu sun,which is 1,035 meters high from the sea level, and Phu ku, which is 1,000 meters high from the sea level. It is the water source of many creeks and rivers such as Huat Nam Dam Huay Bong, Huay Kiengna, Huay Sai Kwao, Huay Tiew, and Huay Pa which is the source of Huay pai waterfall.