Phu Soi Dao National Park

Phu Soi Dao National Park is a protected mountainous park straddling Uttaradit and Phitsanulok provinces along the Thai-Laos border, with its headquarters in Nam Pat District, Uttaradit. Established in 2008, it covers about 340 square kilometers of pine forests, grasslands and waterfalls. It is notable for the 2,102-meter Phu Soi Dao peak, the Lan Son pine meadow famous for seasonal Dok Ngon Nak blooms, and the multi-tiered Sai Thip Waterfall.

Visitors can expect a remote mountainous landscape of pine forests, open grassy meadows and waterfalls. The main experience is a steep 6.5 km hike from the park headquarters to the Lan Son plateau at 1,633 meters, where camping is available among pine trees and seasonal flower fields. Facilities are basic with campsites, visitor centre and viewpoints. The summit of Phu Soi Dao at 2,102 meters is accessible with additional climbing. The park is forested, quiet and requires overnight camping for the full experience.

Established as Thailand's 109th national park in 2008, covering 340.21 square kilometers across Nam Pat District in Uttaradit and Chat Trakan and Nakhon Thai Districts in Phitsanulok. The area preserves watershed forests along the Thai-Laos border and was previously a forest park before national park status.