Doi Khun Mae Ya is the area in the supervision of Khun Mae Ya Watershed Management Unit. The field is under the management of the watershed. Office of Conservation Area No. 16, Department of National Parks, Wildlife and Plant Conservation Department was established in 2518 as a watershed development projects at four (mother glass I), then the agency has changed its name as a unit. upstream of the 4 (mother glass I), the watershed Management royal mother glass. Khun Mae Ya Watershed Management and current, respectively. The Khun Mae Ya Watershed Management Unit. Located in Tambon Mae Hee, Amphur Pai, Mae Hong Son province. Area at the height of 1300 meters above sea level, about 87,500 acres for a total or 120 square kilometers.