Phu Suan Sai National Park covers an area of approximately 73,225 rai (117 square kilometers), encompassing the high mountain ranges in the northern part of Loei Province, extending to the border with Laos, with the Hueang River serving as a natural boundary. The terrain consists of complex mountain ranges with elevations ranging from 600 to 1,408 meters above sea level, with the highest peak being Phu Suan Sai, also known as Hill 1408, which is a key viewpoint and a popular camping area for visitors.

The forest within the park mainly consists of tropical evergreen forests, moist hill forests, and mixed deciduous forests, remaining lush and fertile throughout the year. The park is the source of important rivers such as the Phrae River, Hueang River, and Lek River. During the rainy season, the forest becomes vibrant and filled with birdsong, while in the winter, the air is cool and fog often blankets the mountaintops, creating stunning "sea of clouds" views.

In terms of biodiversity, the park is home to a variety of wildlife, including gaur, wild boars, and more than 240 species of birds. Some species are endemic, such as the Silver-cheeked Woodpecker, Blue-naped Pitta, and Short-tailed Parrotbill, making the park one of the prime birdwatching destinations in northeastern Thailand. Reptiles include rare species such as the Himalayan Mountain Pit Viper, Banded Krait, and Big-headed Turtle. The park is also notable for the discovery of a new species of lichen, Pertusaria loeiensis, which is endemic to Loei Province.

The park features several outstanding natural attractions:

• Hill 1408: The highest point in the park, offering panoramic views of sunrises, sunsets, and sea of clouds.

• Hill 1255: A historical viewpoint with Phra Phuttharaksa and military bunkers from wartime.

• Tad Hueng Waterfall: A large waterfall forming part of the Thai–Laos border.

• Khing Waterfall: An easily accessible roadside waterfall, ideal for relaxation and swimming.

• Wang Tat and Chang Tok Waterfalls: Medium-sized waterfalls along the Phrae River, maintaining a pristine natural environment.

• Phu Hua Hom Viewpoint: A popular camping area for viewing the sea of clouds during winter.

Popular activities include trekking, nature study, birdwatching, camping, viewing the sea of clouds, and landscape photography. The park has well-maintained nature trails suitable for casual visitors as well as explorers who wish to camp in the forest.

The climate in Phu Suan Sai National Park is cool and comfortable throughout the year, with average temperatures ranging from 20–25°C. During winter, temperatures can drop to 5–10°C. The best time to visit is from July to February, when the scenery is at its most beautiful and the weather is pleasant.

• Voiture privée : Se diriger vers les districts de Dan Sai ou Na Haeo via la route nationale 2113 (Dan Sai–Na Haeo), puis continuer sur la route nationale 1268 (route Muang Phrae–Rom Klao). Le bureau du parc se trouve le long de cette route, à environ 15 km du district de Na Haeo et à 8 km avant le siège du parc.

• Transport public : Prendre le bus pour Dan Sai ou Na Haeo, puis louer un véhicule local ou un taxi privé pour se rendre au bureau du parc, point de départ pour la randonnée jusqu’aux sommets.

• Préparation à la randonnée.

• Contactez les responsables du parc à l'avance pour recevoir des alertes et des instructions.

• Il est particulièrement important de voyager pendant cette période, notamment en suivant les sentiers et en mangeant.

• Veillez à la propreté et ne jetez pas de déchets dans les espaces naturels.

• Respectez la réglementation du parc pour préserver un environnement sain.

Entrance Fees

• Thai citizens: Adults 20 THB, Children 10 THB

• Foreign visitors: Adults 100 THB, Children 50 THB
  Fees may change according to the Department of National Parks’ announcements.

Opening Hours

• Open daily from 08.00 – 16.30 (according to the national park’s schedule)