Forest resources

The statistics of the Royal Forest Department in 2016 showed that Mae Hong Son Province had an overall 11,048 square kilometers (or 6,905,002.46 rai) forested areas, or 86.55 percent of the province's area which are in National Reserved Forest, Permanent Forests, National Parks, Wildlife Sanctuaries, Forest Parks and Arboretums.

National Reserved Forest

Mae Hong Son had 9 National Forest Reserves, overall forest area was 11,181.65 square kilometers.

No. National Reserved Forest Area under the Ministerial Regulation Location (Districts) Government Gazette Rai Books/Sessions Date (BE)
1 Salawin 1,822.40 1,139,000 Mae Sariang 89 / 166 7 November 2515
2 Mae Surin 284.00 177,500 Khun Yuam 80 / 82 13 September 2506
3 Mae Yuam Fang Khwa 1,048.20 655,125 Mae Sariang, Mae La Noi 95 / 153 29 December 2521
4 Mae Yuam Fang Sai No.2 2,655.00 1,659,375 Mae Sariang, Mae La Noi, Sop Moei

80 / 83

20 September 2506
5 Mae Pai Fang Sai Ton Lang 968.50 605,313 Mueang Mae Hong Son

108 / 141

13 September 2534
6 Mae Yuam Fang Sai No.1 1,160.25 725,156 Khun Yuam, Mae La Noi

81 / 111

25 November 2507
7 Mae Pai Fang Khwa 1,282.80 801,747 Mueang Mae Hong Son, Pang Mapha 108 / 141 13 September 2534
8 Mae Pai Fang Sai Ton Bon 1,060.50 662,812 Pai

91 / 57

1 April 2517
9 Mae Ngao - Mae Sumpeng 900.00 562,500 Khun Yuam, Mae La Noi

96 / 105

1 July 2522

National park

There are four national parks and one proposed national park consisting of an area of about 3,413.07 square kilometers.

No. National Park Area Location (Districts,Province.) Announcement  (BE.) Rai
1 Namtok Mae Surin 396.60 247,875 Mueang Mae Hong Son, Khun Yuam, Mae Hong Son. 2524
2 Salawin 721.52 450,950 Mae Sariang, Sop Moei, Mae Hong Son. 2537
3 Huai Nam Dang 1,252.12 782,575 Pai, Mae Hong Son; Chiang Dao, Chiang Mai. 2538
4 Tham Pla - Namtok Pha Suea 630.59 394,120 Mueang Mae Hong Son, Mae Hong Son. 2552
5 Mae Ngao (Postponed) 412.24 257,650 Sop Moei, Mae Hong Son. -

Forest Park

There are eleven forest parks, covering an area of 79.20 square kilometers.

No. Forest Park Area Location (Sub-district, District.) Announcement  (BE.) Rai
1 Namtok Mae Sawan Noi 4.50 2,812.00 Mae Ho, Mae Sariang. 2541
2 Thung Buatong 7.10 4,437.00 Khun Yuam District. 2542
3 Pha Hin Tang 5.60 3,500.00 Pha Bong, Mueang Mae Hong Son. 2540
4 Kaeo Ko-mon 0.08 51.26 Mae La Noi, Mae La Noi. 2539
5 Namtok Mai Sang Nam 7.20 4,500.00 Huai Pong, Mueang Mae Hong Son. -
6 Namtok Klo Koh 10.00 6,250.00 Sop Moei, Sop Moei. -
7 Mai Sak Yai 23.00 14,375.00 Mae Sam Laep, Sop Moei. -
8 Namtok Mae Yuam Luang 2.10 1,312.00 Mae Ukho, Khun Yuam. -
9 Tham Thara Lod 3.90 2,436.00 Mae Ho, Mae Sariang. -
10 Namtok Huai Mae Sad 10.72 6,700.00 Sop Moei, Sop Moei. -
11 Namtok Mai Kai 5.00 3,125.00 Mae La Noi District. -

Wildlife sanctuary

There are 6 ordinances in the area of 3,685.52 square kilometers.

No. Wildlife Sanctuary Area Location (Districts, Province.) Announcement  (BE.) Rai
1 Lum Nam Pai 1,180.94 738,085 Mueang Mae Hong Son, Pai, Mae Hong Son. 2515
2 Salawin 955.00 596,875 Mae Sariang, Sop Moei, Mae Hong Son. 2521
3 Mae Yuam Fang Khwa 292.00 182,500 Khun Yuam, Mae La Noi, Mae Hong Son. 2529
4 Mae Lao – Mae Sae 514.00 321,250 Mae Tang, Chiang Mai; Pai, Mae Hong Son. 2539
5 Sun Pan Dan 277.00 173,125 Pang Mapha, Mae Hong Son. 2540
6 Doi Wiang La  466.588 291,610 Khun Yuam, Mae Hong Son. 2543


There are four arboretums, covering an area of 11.47 square kilometers.

No. Arboretum Area Location (Districts) Rai
1 Pong Khae 0.35 216 Mueang Mae Hong Son
2 Mae Surin 5.27 3,293 Khun Yuam
3 Huai Chom Phu 4.20 2,628 Mae Sariang 
4 100 years Royal Forest Department (Doi Mak Hin Hom) 1.65 1,034 Mueang Mae Hong Son


Biological resources

With the topography of Mae Hong Son Province is 100 - 2000 meters above sea level, the various types of forest had found. There are evergeen forest comprising tropical rain forest, hill evergreen forest, coniferous forest and deciduous forest comprising mixed deciduous forest and dry deciduous dipterocarp forest. There are also degraded forest and shifting cultivation. Most of the trees in the forest are valuable, such as Teak, Siamese Sal, Burmese Sal, Ironwood, Burma Padauk, Rosewood, Afzelia, Laurel, Red cedar, Thingan, Yon, Hiang, Pluang, Tabaek, etc. 

The wildlife found are serow, sambar deer, red muntjac, eurasian wild pig, banteng, tiger, siamese hare, squirrel, treeshrew, gibbon, about 120 species of birds, about 30 species of mammals, 5 species of amphibians,  about 30 kinds of freshwater fish and about 200 species of insects.


Geothermal resources

Mae Hong Son Province is characterized by a intermontane basin with a height of 200 meters above mean sea level, consisting of a Pan basin, Khun Yuam basin and Mae Sariang basin. The longitudinal shape is almost in the north - south as a collection of sediment. Because of the water and sediment from the water flowing from the mountains around the basin. Geological features include: The rock and sand sands are classified into 10 units as summarized below.

  1. Sedimentary sand, clay, fine gravel found in the narrow areas of the riverside plains, such as Moei stream, Mae Yuam stream, Mae Sanga stream, etc. Including with sandy soil, sandy clay, fine gravel and dirt in some layers. From the water to the gravel, rocks, sand and soil to collect samples are not systematic. The influence of slope and surface water mixed. So many different types of sediment.
  2. Sedimentary gravel, sand, skeletal soil found in the narrow areas along the edge of the plain in Pai district, Khun Yuam district, Mae La Noi district, Mae Sariang district and Sop Moei district. Terrain is a step ladder consisting of a relatively thick layer of gravel alternating with sand and clay. Gravels are very rounded, ranging from 2 millimeters to larger. Some meters have a solution of iron oxide to become a nest and dirt. The river eroded more vertically.
  3. Rubble, gravel, sand, clay, found in the narrow areas in Mae La Noi district along the Highway 108 (Khun Yuam district - Mae La Noi district) consists of rubble, gravel, sand and clay. From the water from the valley down the steep slope. As the velocity of the tide decreases, sediment accumulates near the hills. Spread out around fan style. Used as a source of soil for construction.
  4. Sedimentary rock - claystone, coal are found in narrow areas in Pai district. It consists of claystone, sandstone, siltstone, ball clay, coal and oil shale are semi-solid. Two species of freshwater mussels are found. Fish and many mammals. It may be found at the same time as the snake crab in Krabi. It is a source of mineral deposits, such as natural gas, coal, and oil shale. These rocks are formed and accumulate in sediment accumulation in mountainous areas with freshwater lake environment.
  5. Sedimentary rock - sandstone, mostly distributed in the north and the west of Mae Hong Son province, Covers some parts of Pai district, Pang Mapha district, Mueang Mae Hong Son district, Mae Sariang district and Sop Moei district.
  6. Sedimentary rock - shale is spread widely in Mae Hong Son province, from the north of Pang Mapha district to the south of  Sop Moei district, consists of shale, chert, siltstone, sandstone, limestone and tuff. Most of the hills are found. However, in areas that remain high mountains, there is a risk of further soil erosion.
  7. Sedimentary rock - limestone, found in Mae Hong Son province, appears as a wide area north and south of the area. Covering part of Pang Mapha district, Pai district, Mae Sariang district and Sop Moei district. The middle part of the area. Rough appearance Posing in the north-south line from Mueang Mae Hong Son district, Khun Yuam district, Mae La Noi district and Mae Sariang district. Contains dark gray limestone, shale, sandstone and dolomite are interlaced. The topography is steep with many peaks. The landscape is beautiful.
  8. Metamorphic rock - phyllite, slate, schist and quartzite distribution in Mae Hong Son Province. It appears to be a wide area on the northeast and southwest of Sop Moei district. The middle of the area,  appears narrowly in the north-south line, covering part of Mueang Mae Hong Son district, Khun Yuam district And Mae Sariang district. It is also found slightly in Pai district.
  9. Metamorphic rock - gneiss, schist found in the narrow area in the southern part of Pai distirct and the west of Mae Sariang district. Metamorphic rocks that have a medium to high degree of transformation include gneiss, schist, chalk, silicate and marble. The parts of migmatite were transformed into melts and granite is mixed with. Because of these metamorphic rocks, the topography is steep. High mountainous areas may cause landslides during heavy rain.
  10. Intrusive igneous rock - granite, diorite are found in the eastern part of Mae Hong Son province,  covering some areas of Pang Mapha district, Pai district, Khun Yuam district. Mae Sariang district and Sop Moei district, in high mountainous terrain. Composed of granite, diorite. Granite is closely related to several economic minerals, such as tin, wolfram, fluorite and barite.


Mineral resources

Mae Hong Son Province has many important economic mineral resources. It can be defined as ten mineral resources. Mineral resources include limestone, coal, lignite, lead, zinc, tin, tungsten, antimony, fluoride and feldspar. The mineral area is approximately 2,440 square kilometers. Accounted for 19 percent of the province's area.


Water resources

Water Resources of Mae Hong Son Province, most of them are from the forest area upstream of the mountain ranges between Thanon Thong Chai range, Dan Lao range and mountain range in the south of Khun Yuam district. The main rivers are Pai river, Salwin river, Yuam river, and the secondary rivers are Mae Surin river, Mae La Luang river, Mae Ngao river, Nam Khong river, Nam Mae Rit river, Mae Sariang river, Mae Sanga river, Mae Samat river. The volume of water stored around the year is about 13.09 million cubic meters. The average rainfall is 1,250.60 cubic meters. There are water reservoirs under the supervision of various government agencies. There are 2 medium reservoirs: Huai Mae Hong Son reservoir and Mae Sakuet reservoir (Mon Ta Lang), and 29 small reservoirs such as Huai Pong On reservoir, Pang Kong reservoir, Pam Klang reservoir, Huai So Tue reservoir, Mak Fak Thong reservoir, Mae Salap reservoir, etc. The overall capacity of the reservoirs is 12.31 million cubic meters. There are also weirs such as Pang Mapha weir, Khun Yuam weir, Nam Yuam weir, Mae Sariang weir, etc.

There are 617 groundwater wells in Mae Hong Son Province, which are used to drill groundwater for general consumption. Or for agriculture Or to use in the business sector. Or for use in the industry.


No. Reservoir Capacity (m3) Description
Mueang Mae Hong Son District
1 Huai Mae Hong Son 734,000 Medium reservoir
2 Mon Ta Lang 530,000 Medium reservoir
3 Huai Pong On 645,000 Royal Initiative
4 Huai Chong Chai 304,000 Royal Initiative
5 Huai Sai Lae 450,000 Royal Initiative
6 Huai Ussadong 107,000 Royal Initiative
7 Huai Klai Rung 124,000 Royal Initiative
8 Huai Pang Tong 580,000 Royal Initiative
9 Huai Pong Chan 610,000 Royal Initiative
10 Huai Fai Kho 950,000 Royal Initiative
11 Huai Pong 436,000 Royal Initiative
12 Huai Pha 108,800 Royal Initiative
13 Huai Makhuea Som 400,000 Royal Initiative
14 Na Krachong 200,000 Royal Initiative
15 Ton Nam Lam Than 28,000 Royal Initiative
Pang Mapha District
16 Pang Kong 113,000 Royal Initiative
Pai District
17 Huai E Khai 60,000 Royal Initiative
18 Huai Som 110,000 Royal Initiative
19 Pam Klang 310,750 -
Khun Yuam District
20 Huai Man 520,000  
21 Huai So Tue 1,880,000  
22 Huai Pu Luang 168,000  
23 Huai Bong 281,800  
Mae La Noi District
24 Mak Fak Tong 380,000 Royal Initiative
Mae Sariang District
25 Huai Luang 102,000 -
26 Huai Pu 200,000 -
27 Mae Salap 700,000 -
28 Huai Sing Luang 350,000 -
Sob Moei District
28 Pha pa - -
30 Mae Ko 510,000 -
31 Huai pa kan 400,000 -