Pha Sok, Ubon Ratchathani

Pha Sok is located in Huai Phai Sub District in the area of Pha Taem National Park. It is a sandstone terrace that has been eroded into trenches and deep basins until becoming Pha Sok. (The word “Sok” refers to the long groove caused by water erosion.) It is a scenic point overlooking the Mekong River and the long undulating mountains. The important spot is the natural pool located on the edge of the cliff in the area of Pha Sok. It is like a natural bath where one can soak in the view. The best time to travel is the rainy season.

Visitor Information

• Entry Fee: Free (Thai nationals: Free)
• Opening Hours: Daily 08:00-18:00

Getting There

Pha Sok is located at Khong Chiam, Ubon Ratchathani. View on Google Maps.

Tips for Visitors

• Leeches can be common after rain — wear long socks and closed shoes.
• Camping gear can often be rented at the park headquarters.
• Entry fee for foreigners is typically 200-400 THB (paid at the gate).
• Bring plenty of water, sun protection, and insect repellent.