Phu Soi Dao National Park, a renowned ecological sanctuary in northern Thailand, will reopen to the public on 1 July 2025 following its annual closure. The seasonal break, which extends from 10 January to 30 June, is implemented to support environmental regeneration and reduce the risk of forest fires during the dry season. With the landscape now revitalized, the park invites trekkers, nature enthusiasts, and eco-conscious travelers to explore its famed pine forests, flower-filled meadows, and mist-covered mountain trails.
At the heart of the park’s appeal is the Larn Paa Son plateau, a highland expanse situated 1,630 metres above sea level. Blanketed by pine trees and encircled by panoramic vistas, this area offers a secluded camping experience amid unspoiled natural beauty. Access to Larn Paa Son will remain available until 10 January 2026, after which the park will once again close for seasonal recovery.
Visitors returning this season can expect to witness the vibrant resurgence of local flora and fauna. During the rainy months, wildflowers flourish across the landscape, most notably the Crested Naga flower (Murdannia giganteum), whose violet blooms create sweeping carpets of color across the grasslands. Another highlight is the appearance of Dusita flowers, which accent the terrain with their distinctive hues.
Trekking routes throughout the park guide hikers through dense pine forests, over grassy knolls, and past mountain streams. Elevated viewpoints offer sweeping sights of fog-shrouded peaks and cascading waterfalls, while the park’s rich biodiversity includes rare plants and wildlife well adapted to the cool, high-altitude environment.
Located along the Thai-Lao border, Phu Soi Dao is part of the Luang Prabang Range and spans both Uttaradit and Phitsanulok provinces. The park takes its name from Phu Soi Dao Mountain, which rises to 2,120 metres and ranks as the fifth highest peak in Thailand. Its varied terrain includes evergreen forests, rugged cliffs, and peaceful meadows, making it a key destination for adventure tourism and environmental education.
With its reopening, park authorities are reinforcing sustainable tourism measures. Daily visitor numbers are capped, and permits are required for both trekking and camping. These restrictions are designed to safeguard the park’s delicate ecosystems while ensuring a high-quality experience for guests. Visitors are also expected to be physically prepared for the journey, which involves challenging ascents and extended hiking at altitude. No commercial vendors operate within the trekking zone, so self-sufficiency—including carrying one’s own gear and supplies—is essential.
The relaunch of Phu Soi Dao National Park marks more than just the return of access; it underscores Thailand’s broader commitment to responsible tourism. Park officials encourage travelers to adhere strictly to conservation guidelines, promoting low-impact travel and environmental respect.
As the rainy season begins, Phu Soi Dao once again offers a compelling escape into Thailand’s highland wilderness. Whether drawn by its tranquil pinewood landscapes, the spectacle of seasonal blooms, or the challenge of mountain trekking, visitors will find the park’s natural wonders both invigorating and enduring.
