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  Na Yung-Nam Som National Park
Catagorize: Waterfalls , National Parks & Marine Reserves

Na Yung-Nam Som National Park is the 3 patched-province area: Udonthani, Loei and Nong Khai provinces. The topography condition is slope complex mountainous above 200-500 m from the mean sea level. The mountain with the highest peak is Phu Ya-u about 588 m. General forest condition is still abundant and is the main source of the rivers and streams, such as Huai Nam Som and Huai Tat Ton. Soils are sandy loam in dry evergreen and mixed deciduous forests and lateritic soils in dry dipterocarp forests. Most of the rocks found are sandstones. 

Weather Condition

Due to the monsoon, it is very hot in summer about 40 Celsius between March and May. The rainy season starts from June to October and the winter from November to February with the temperature of about 10-20 Celsius. Rainfall is about 1,000-1,500 mm all year round.

Varieties of Plants and Wild Animals

Forest conditions are dry dipterocarp forests distributed along foothills and hill ranges. The main species are Shorea obtasa, S. siamensis, Dipterocarpus tuberculatus etc. Lower plants are Vietnamosasa pusilla, Curcuma sp. Down the valley is mixed deciduous forest, Dalbergia oliveri, Xylia xylocarpa, Pterocarpus macrocarpus, Sindora siamensis, and various species of bamboo such as Gigantochloa albocilliata, Bambusa bambos, Dendrocalamus sp. are found. Along the riverside is dry evergreen forest, Afzelia xylocarpa Anisoptera costata, Dipterocarpus spp. Lagerstoemia spp., Hopea sp. etc. Lower plant found rattan, palm, herbs etc, are found, while symbiosis species like orchid and fern are found. Undergrowth species are rattan, palm and herbs. 

Tourist Attractions 

Pha Daeng Viewpoint   Pha Daeng viewpoint is about 1,500 m from the national park office. Along the nature trail to Yung Thong Waterfall, Pha Daeng is sandstone slope cliff, where a large beautiful lower scenery can be observed. Next to Pha Daeng, there is a tiny cave that used to be a meditation for Luang Pu Man Phurithatto.

Yung Thong Waterfall Nature Trail   is an on foot trail to study nature arranged by the park to communicate the meaning of nature to visitors through a lecture media along the route. The trail passes Yung Thong and Tat Noi waterfalls and Pha Daeng viewpoint for 2,000 m.  

Entrance fee

Adults 20-80 baht 

Children 10-40 baht

Children under 14 years old and not exceeding 3 years free of charge

Note: In case of students, the fee is the same as that of children.


Website: http:// http://www.dnp.go.th/parkreserve/asp/style1/default.asp?npid=95&lg=1