Phu Wiang National Park, the topography is generally a mountain range surrounded in a circle on 2 levels, in the middle is a large basin like a pan, which is a flat and undulating slop. Surrounding area is mountain rage which is angled towards the center of the basin, it consists of mountains with moderate to steep slopes, the most of outer mountain range has a peak of 844 meters above middle sea level. The south western part of the area and the inner mountain range has the highest peak 470 meters above sea level. On the area of inner mountain rage, there is a source of dinosaur fossils. The lowest level of the foothills is 210 meters above sea level.