Overview

Kaeng Krachan National Park is the largest protected area in Thailand. Known in Thai as แก่งกระจาน, the park occupies a remote, forested zone along the country's western frontier and adjoins Myanmar’s protected lands. Its position at the edge of the Tenasserim mountain chain creates a broad, continuous block of natural habitat that is important for regional conservation and cross‑border wildlife movement (Myanmar).

Geography and hydrology

Kaeng Krachan spans parts of Phetchaburi and Prachuap Khiri Khan provinces and contains extensive lowland and montane rainforest. Much of the park is covered by tropical rainforest and mixed evergreen forest on slopes that rise to about around 1,200 metres above sea level. Two important rivers originate within the park: the Pranburi and the Phetchaburi. The latter is impounded at the park’s eastern boundary by the Kaeng Krachan Dam, creating a large reservoir that is both an ecological feature and a water resource for surrounding areas.

The area was formally designated a protected park on 12 June 1981 and was Thailand’s 28th national park. Its original boundaries encompassed roughly 2,478 square kilometres and were adjusted and expanded in the 1980s to include additional forested slopes and watershed. The park has been the subject of international attention: it was proposed to UNESCO in the mid‑2000s for possible inscription as a World Heritage Site, reflecting its size and ecological value.

Biodiversity, land use and threats

Kaeng Krachan supports a rich assemblage of plants and animals and contributes to regional biodiversity. It is home to many forest mammals, birds and reptiles typical of Southeast Asian rainforests. Land‑use issues persist inside and around the park: small areas of private plantations and agricultural encroachment have been recorded, and illegal hunting remains a serious concern. The killing of wild elephants and other high‑value species has been reported, and park authorities continue to struggle against organized poaching.

Visiting, significance and management

The park is a popular destination for ecotourists and nature‑based visitors, partly because it lies within reach of the coastal resort area around Hua Hin. Facilities are basic in many sections, and travel into interior zones often requires a permit or guided transport. Management priorities balance visitor access, water resource protection and wildlife conservation. The park’s role as a transboundary forest link with Myanmar is especially important for wide‑ranging species and for maintaining ecological connectivity across the Tenasserim range.

Useful facts

  • Designation: national park (protected area).
  • Location: border region adjoining Myanmar and the Tanintharyi reserve.
  • Major infrastructure: Kaeng Krachan Dam and reservoir.
  • Conservation issues: habitat protection, illegal hunting and conflicts over land use.

Researchers, conservationists and visitors interested in tropical forest dynamics, watershed protection and large‑mammal ecology regard Kaeng Krachan as one of Thailand’s most important protected landscapes. For official guidance on access, permits and current regulations, consult park authorities or recognized conservation organizations before planning a visit (Thai name reference; further resources listed via local park offices and NGOs).