Khao Sok National Park

Khao Sok National Park
Name	Khao Sok National Park
Iucn category	II
Photo caption	Limestone karsts and Cheow Lan Lake
Location	Surat Thani Province, Thailand
Nearest city	Surat Thani
Area	739 km2
Established	1980
Governing body	Department of National Parks, Wildlife and Plant Conservation

Contents

Khao Sok National Park is a protected area in southern Thailand known for its ancient rainforest, dramatic limestone karst formations, and the expansive Cheow Lan Lake. The park spans parts of Surat Thani Province, Phuket Province, and Nakhon Si Thammarat Province regions and is managed under Thailand's protected area system by the Department of National Parks, Wildlife and Plant Conservation. It has become a focal point for research by institutions such as Mahidol University, Chulalongkorn University, and Prince of Songkla University and features in conservation collaborations with organizations like World Wildlife Fund and IUCN.

Geography and Climate

Khao Sok lies within the Tenasserim Hills biogeographic region near the Malay Peninsula and is characterized by steep limestone karst towers, lowland evergreen rainforest, and riverine systems that feed the Phum Duang River and Ratchaprapha Dam reservoir (Cheow Lan Lake), linking to hydrographic networks studied by teams from Asian Institute of Technology, Kasetsart University, and Royal Forest Department. The geology includes Paleozoic sedimentary rocks similar to formations in Langkawi and Gunung Mulu National Park; geomorphological surveys by Geological Survey of Thailand reference karstic processes comparable to Phong Nha-Kẻ Bàng National Park and Ha Long Bay. The climate is tropical monsoon with patterns influenced by the Southwest Monsoon and Northeast Monsoon, producing seasonal rainfall monitored by the Thai Meteorological Department and linked to regional phenomena studied at NOAA and IPCC assessments.

Human presence in the Khao Sok area is tied to ethnic groups such as the Moken and Chewong peoples and historical frontier movements recorded during the Ayutthaya Kingdom and Rattanakosin Kingdom periods, appearing in provincial archives maintained by Surat Thani Provincial Office and researched at National Archives of Thailand. Botanical and zoological exploration by figures associated with Royal Siam Society, early surveys by Prince Damrong Rajanubhab period naturalists, and 20th-century expeditions from British Museum and Smithsonian Institution generated baseline inventories that influenced the designation of protected status under Thai law via the National Park Act of Thailand and the establishment of the park in 1980 by the Royal Forest Department. International interest driven by publications in journals like Nature and Science and by documentaries produced by BBC Natural History Unit and National Geographic elevated the park's profile, prompting joint conservation projects with UNESCO advisors.

The park's lowland evergreen rainforest supports dipterocarp species catalogued by Royal Botanic Gardens, Kew and Forest Herbarium, Bangkok, with canopy trees related to taxa documented in Gunung Leuser National Park and Taman Negara. Notable flora include towering dipterocarps, rattan species, and epiphytes studied by researchers from International Union for Conservation of Nature field teams and Museums of Natural History. Fauna surveys reveal occurrences of Asian elephant and populations akin to those in Huai Kha Khaeng Wildlife Sanctuary; carnivores such as tiger (historical records), clouded leopard, leopard cat, and sun bear have been reported in camera-trap studies by teams from WildCRU and Zoological Society of London, while arboreal mammals include binturong and various gibbon species akin to those in Kaeng Krachan National Park and Khao Yai National Park. Avifauna lists overlap with inventories for Kinabalu National Park and include hornbills documented by BirdLife International and ornithologists from Cornell Lab of Ornithology. Herpetofauna and amphibians are comparable to assemblages in Doi Inthanon National Park and include rare frogs and snakes catalogued by Thai Herpetological Society. Freshwater ecosystems host fishes and invertebrates similar to those studied by Southeast Asian Fisheries Development Center.

Visitors encounter Cheow Lan Lake created by the Ratchaprapha Dam and can explore limestone pinnacles resembling scenery in Vang Vieng and Phong Nha-Kẻ Bàng via boat tours organized by operators endorsed by Tourism Authority of Thailand, staying in floating bungalows promoted alongside services in Ao Nang, Khao Lak, and Surat Thani. Popular activities include guided jungle trekking led by licensed guides certified through Department of National Parks, Wildlife and Plant Conservation programs, canoeing and kayaking promoted by adventure outfitters linked to International Mountain Bicycling Association events, birdwatching tours coordinated with BirdLife International, and cave exploration referencing routes similar to those in Tham Lot and Tham Khao Bin. Research and eco-volunteering opportunities are offered through partnerships with Mahidol University, Wildlife Conservation Society, and NGOs modeled on campaigns by Conservation International.

Management frameworks integrate national statutes from the National Park Act of Thailand and strategies aligned with Convention on Biological Diversity and Ramsar Convention principles when applicable to wetlands, coordinated with the Department of National Parks, Wildlife and Plant Conservation and multi-stakeholder initiatives including World Wildlife Fund, IUCN, and local community groups reminiscent of community forestry projects by FAO. Threats such as illegal logging, wildlife poaching, and hydrological alteration from hydroelectric projects have been addressed via enforcement by Royal Thai Police units, patrols supported by Wildlife Conservation Society, and conservation research by Chulalongkorn University and international partners like BirdLife International and Zoological Society of London. Restoration and sustainable tourism efforts draw on models from Costa Rica and Galápagos Islands conservation programs and funding from entities including UNEP and bilateral aid.

Access to the park is mainly via road routes from Surat Thani city, train services on the Southern Line arriving at Surat Thani Railway Station, and regional airports such as Surat Thani Airport and Phuket International Airport, with transfers arranged by operators registered with Tourism Authority of Thailand and provincial tourism offices like Surat Thani Provincial Administrative Organization. Visitor infrastructure follows guidelines set by Department of National Parks, Wildlife and Plant Conservation for permits, accommodation permits for floating camps, and safety protocols informed by case studies from New Zealand Department of Conservation and Australian Parks and Wildlife Service. Sustainable tourism initiatives have been promoted in collaboration with NGOs such as WWF-Thailand and academic programs at Prince of Songkla University and Mahidol University.