Huai Nam Dang National Park

Huai Nam Dang National Park is direct east of Pai in Pai District of Mae Hong Son Province and about 50 kilometres (30 mi) north of Chiang Mai in the Mae Taeng and Wiang Haeng Districts of Chiang Mai Province. The park's area is 1,252 square kilometres (483 sq mi). The highest point is Doi Chang peak at 1,962 metres (6,437 ft), the height ranges from 400 metres (1,300 ft) to 1,962 metres (6,437 ft). The park's streams are the source for rivers including the Pai and Taeng.^[3]

The park is generally cool all year round, with average high temperature of 23 °C (73 °F) and average lowest temperature of 8 °C (46 °F). Rainy season is from May to September, average rainfall is 1,134 millimetres (44.6 in)/year with max.temperature of 24 °C (75 °F) and min.temperature of 10 °C (50 °F). Winter is from October to February with max.temperature of 20 °C (68 °F) and min.temperature of 2 °C (36 °F). Summer is from March to April with max.temperature of 28 °C (82 °F) and min.temperature of 12 °C (54 °F).^[3]

A survey of the Huai Nam Dang area was set up in December 1987. Later on 14 August 1995 Hui Nam Dang National Park, covers Chiang Dao, Mae Taeng and Mai Pai forests, with an area of 782,575 rai ~ 1,252 square kilometres (483 sq mi) has been declared the 81st national park.^[3][4]

Doi Chang and Doi Kiew Lom mountains offer popular viewpoints of neighbouring mountains and a "sea of fog" effect on winter mornings. Park namesake waterfall, Huai Nam Dang, consists of four levels and is about 50 metres (160 ft) high and 40 metres (130 ft) wide. Mae Yen is another year-round waterfall. Park hot springs include Pong Dueat, consisting of three or four large pools, and Tha Pai in the Pai District section of the park.^[2]

The park is home to numerous forest types, such as evergreen, deciduous and dipterocarp forest.
Evergreen forest include:^[3][2]

Deciduous forest include:^[3][2]

Dipterocarp forest include:^[3][2]

Mammals:^[3][2]

Reptiles:^[3]

Birds:

Species of passerines include:^[3][2]

Species of non-passerines include:^[3][2]

• 
  Flowers and trees on the slopes
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  Vegetation
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  Panoramic view of the hills
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  The morning scenery viewed from Doi Kio Lom Viewpoint
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  Hill Pine Camp
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  Pong Dueat Hot Springs
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  Ailanthus triphysa
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  Sambar deer

• List of national parks of Thailand
• DNP - Huai Nam Dang National Park^[5]
• List of Protected Areas Regional Offices of Thailand