Ranong has the characteristic elongated shape. The narrow North-most purely southern length 169 kilometers with the widest part is ground. Approximately 25 kilometres and has the most narrow part 9 km topography consists of mountains. The Valley is covered with forest, and complex to the East of the province. Slope to the Andaman Sea to the West. The highest mountain of the province is mountainous, father Ta chong dhong 1,700 ft high dosages.