Lam Nam Nan National Park

Lam Nam Nan National Park is a large protected area spanning Uttaradit and Phrae provinces in northern Thailand, centered on the Sirikit Dam reservoir on the Nan River. Established on 30 September 1998, it covers approximately 999 sq km of forested mountains, reservoir shoreline and islands. Notable for viewpoints such as Phu Phaya Pho, waterfalls like Choeng Thong, and reservoir scenery, it protects important watershed forests and supports camping, boating and nature observation.

Visitors can expect a forested mountain landscape surrounding the extensive Sirikit Dam reservoir with islands, coves and shoreline viewpoints. The park headquarters area provides access to Phu Phaya Pho viewpoint overlooking the reservoir, forest trails, and seasonal waterfalls such as Choeng Thong. Facilities include a visitor centre, campsites and bungalows near the water. Activities focus on sightseeing, photography, boating on the reservoir, fishing in designated areas, camping and short hikes through mixed deciduous and dry evergreen forest.

Designated as Thailand's 59th national park on 30 September 1998, covering about 999.15 sq km across Tha Pla, Nam Pat and Mueang districts of Uttaradit and Na Muen and Wiang Sa districts of Nan/Phrae. Established to protect the Nan River watershed forests and the catchment of the Sirikit Dam reservoir, the country's largest earth-filled dam completed in the 1970s.

The reservoir and surrounding forests support local communities whose livelihoods include fishing, agriculture and reservoir transport, and the park is a regional recreation area for residents of Uttaradit and neighboring provinces.