Phu Soi Dao National Park (Phu Soi Dao National Park) is one of the most remarkable trekking destinations in Uttaradit Province. The highest peak reaches 2,102 meters above sea level, ranking as the 4th highest mountain in Thailand, with cool weather year-round and mountainous terrain along the Thai–Lao border.

Natural Highlights:

The highlight is the vast Phu Soi Dao Pine Field, a unique highland plain covered with three-needle pine trees arranged beautifully across open grassland.
During the rainy season, the area transforms into a purple field of Nakkha Flowers (Nakkha Flowers / Murdannia giganteum), creating a rare and stunning landscape.

Trekking Route:

The journey to the pine field is both challenging and rewarding. Visitors must hike approximately 6.5 kilometers, taking around 4–6 hours, through dense forest, streams, and steep trails.

Trekkers will conquer the famous Five Challenging Hills:

• Send Yat Hill
• Prab Sian Hill 
• Pa Ko Hill 
• Sua Khrong Hill 
• Morana Hill 

Each hill offers different levels of difficulty and scenery, with Prab Sian Hill being the toughest section.

Attractions at the Base:

At the foothill lies Phu Soi Dao Waterfall, a small multi-tiered waterfall surrounded by lush forest, ideal for relaxing before starting the trek and serving as an important water source.

Ecosystem and Biodiversity:

The park is rich in biodiversity, consisting of several forest types:

• Tropical Rainforest
• Montane Forest
• Pine Forest

It is home to wildlife such as barking deer, wild boars, and various bird species, along with rare high-altitude plants.

Accommodation & Facilities:

At the top, there is a designated camping ground with ranger supervision for safety.

Important notes:

• Visitors must bring their own camping gear and food
• Porter services are available at the starting point

A must-do experience is watching the sunrise over a sea of mist and enjoying a star-filled night sky.

Best Seasons:

• Rainy Season (Aug – Sep): Nakkha flowers and lush greenery
• Cool Season (Nov – Jan): Cold weather, mist, and foliage
• Summer: Quiet atmosphere and open views

With its natural beauty, trekking challenges, and peaceful atmosphere, Phu Soi Dao is a perfect destination for adventurers and nature lovers seeking an unforgettable experience.

• By Car: From Uttaradit city, take Highway No. 1045 toward Nam Pat district, then continue via Highways No. 1239 and 1268. Total distance is approximately 130 kilometers.

• Best time to visit: August – September (Nakkha flowers) or November – January (cool weather)

• Book in advance via the QueQ application

• Prepare for a 4–6 hour trek

• Wear non-slip trekking shoes

• Bring rain gear and leech protection during the rainy season

Admission Fee:

Thai Nationals:

• Adults: 40 THB

• Children: 20 THB

Foreign Visitors:

• Adults: 200 THB

• Children: 100 THB

Additional fees apply for camping and porter services

Opening Hours:

• Visitor Center: 08:00 – 16:30

• Last trekking entry: 14:00 (for safety reasons)