Phu Soi Dao National Park

Phu Soi Dao National Park (), named after 2,120 m high Phu Soi Dao mountain, is a protected area at the southern end of the Luang Prabang Range in the Thai/Lao border area, on the Thai side of the range. It is located in 
Nam Pat District of Uttaradit Province and Chat Trakan District of Phitsanulok Province. The park was established as Thailand's 109th national park in 2008.
Attractions.
Namtok Phu Soi Dao a 5-tiered waterfall and namtok Sai Thip a 7-tiered waterfall are some of the attractions of the park. The landscape is similar to the area on the Phu Kradueng plateau further southeast, with grasslands and pine trees such as "Pinus kesiya". "Betula alnoides", "Schima wallichii" and "Shorea siamensis" are among the other species of trees present in the forest. "Utricularia spinomarginata" and "Utricularia phusoidaoensis" are endemic plants on Phu Soi Dao.
The most highlighted thing here are "dok ngon nak" (ดอกหงอนนาค–"Murdannia gigantea") which will bloom all over the fields during rainy season (๋July–August), causing a beautiful purple scenery.
Topography.
The park is bordered by Laos PDR for a length of about and is up to wide at its widest point. Landscape is mostly covered by mountains and forests (85%) and some small plains (15%), the height ranges from to . Several rivers have their source within the park, including Pat and Kwae Noi rivers.
Climate.
The park is generally cool all year round. Average high temperature is , average lowest temparature is , average mean temperature is . Rainy season is from May to October, average rainfall is /year. Winter is from November to February and summer is from April to June.
History.
A survey was set up in November 1990, with an area of only . In 1992 the area was extended to . In 1993 Phu Soi Dao National Park was proposed, with the inclusion of Phu Soi Dao waterfall. In 2008 Phu Soi Dao National Park, including Nam Pat forest and Phu Soi Dao forest, with an area of was declared the 109th national park.
Flora.
The park is home to numerous forest types, such as evergreen, deciduous and dipterocarp forest.<br>
Evergreen forest include:
Deciduous forest include:
Dipterocarp forest include:
Plant species include:
Fauna.
Mammel sorts include:
Other animal sorts include: