Huai Nam Dang National Park is located on the Thanon Thong Chai Mountain covering Mae Taeng district in Chiangmai and Pai district in Mae Hong son province with the area of approximately 179.5 square kilometers or 112,187.5 fields. Most of the areas are ranged hills and high rugged mountains. The tallest mountain is Doi Chaang where the river source and numerous brooks are located. In the winter, it is chilly; the wind is strong and it is raining heavily during May – October. As for summer, the temperature reaches the highest around 34 Celsius degrees.