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Physical Features

Most of the protected area is covered by mixed deciduous forest, in particular in Nam Ha East. In the Nam Ha West, a range of mountains runs from “Phou 2094” to the China/Lao border to the northeast. Along the top of this range is mainly dry evergreen forest and some grassland. Three large rivers drain southward to Mekong: the Nam Tha, Nam Fa, and Nam Long.
540-2094 m, most areas among 1000-1500m


The rainy season runs from May to September. Average annual rainfall is 1,256 cm, and the maximum rainfall about 1,990. During the colder months of the dry season, from December to February, temperatures can reach as low as 5°c. In the mornings, heavy fog is common, usually clearing and becoming warm and sunny by mid-day. The average annual temperature 23.75°c.


Main Forest Types 
The majority of the NPA is covered by mixed secondary deciduous forest and includes secondary evergreen forest, particularly semi-evergreen forest and moist evergreen forest (Berkmuller, et al. 1995, Tizard et al. WCS 1997).  Tizard, et. al. identified four vegetation zones in the NPA.  They are the Luang Namtha plain, from 540-1000 m that includes a “mosaic of human-modified habitats” made up of bamboo, secondary evergreen forest and scrub.  The Northern Highlands zone goes from 1000-2094 m with patches of primary evergreen forest mixed with secondary forest and large patches of Imperata grass.  The Southern Highlands range from 1000-1572 m with both evergreen forest and scrub.  The Nam Kong area along the China border ranges from 600-1556 m.  It is characterized by secondary evergreen forest and scrub.


Recorded Vertebrates


Vertebrate Class

 No. of Species

 No. of Key Species








 Not surveyed



 Not surveyed



 Not surveyed