Sirindhorn Dam and Reservoir
Sirindhorn Dam in Ubon Ratchathani Province holds a vast reservoir with turquoise waters framed by forested hills. A natural retreat cherished by Thai visitors for its dramatic sunsets and scenic boat excursions.
Sirindhorn Dam rises in Ubon Ratchathani Province in Isan (northeastern Thailand), spanning the Lam Dom Noi River. Built during the 1960s and inaugurated in 1971, it holds an expansive reservoir that irrigates surrounding rice fields and powers a hydroelectric plant. The site draws Thai visitors for its lake scenery, spectacular sunsets, and the relative coolness it offers in this hot, arid region.
Practical information at a glance
- Access: Car or motorcycle recommended from Ubon Ratchathani (approximately 70 km southeast); limited direct public transport.
- Entrance: Free access to the dam and reservoir shores.
- Suggested duration: Half-day to full day if picnicking or taking a boat ride.
What to see
The reservoir extends across several dozen square kilometers, bordered by wooded hills. During the dry season (November–April), rocky islands emerge and the waters take on their characteristic turquoise hue. Motorboats offer scenic cruises across the lake. On the shores, shaded parks welcome picnics and Thai families, especially on weekends.
History and background
The dam is named after Princess Sirindhorn, daughter of King Bhumibol Adulyadej. Its construction was part of an extensive royal rural development program for Isan, a region historically marked by poverty and drought. The adjacent hydroelectric plant continues to supply electricity to the region today.
Highlights of your visit
Sunset over the reservoir
In late afternoon, low-angle light colors the water and opposite hillsides in warm tones. The landscaped shores near the dam offer an unobstructed viewpoint free from vegetation.
Boat excursion
Local boats allow you to explore coves and islands that emerge during the dry season. This is the most effective way to grasp the lake's scale and observe aquatic birds.
Riverbank park
The dam's surroundings feature rest areas, gardens, and viewpoints overlooking the concrete structure. The atmosphere mirrors a provincial Thai leisure park, particularly lively on weekends.
Photography tips
Morning light (before 9 a.m.) and evening light (after 4 p.m.) are most favorable. In the dry season, rocky outcrops in the lake create compelling foreground elements. From the dam's crest, the panorama across the reservoir is at its widest.
Location and access
The dam lies in Sirindhorn District, Ubon Ratchathani Province. The road from Ubon Ratchathani city is paved and passable by standard car. The site sits near the Laotian border; Pha Taem National Park, renowned for its rock paintings, is located in the same province.
Nearby attractions
- Pha Taem National Park — Mekong River cliffs and ancient rock paintings spanning millennia.
- Ubon Ratchathani — provincial capital featuring remarkable temples and a national museum.
- Wat Phu Tok (Bueng Kan Province, further north) — Buddhist monastery perched atop a rocky inselberg.
Frequently asked questions
The dry season, November to April, is ideal: water levels drop, rocky islands emerge, and skies remain clear. During the rainy season (May–October), the reservoir fills but visibility diminishes.
A rental car or motorcycle is the most practical option. The route is straightforward heading southeast from Ubon Ratchathani. Local public transport is infrequent and less suited to tourists.
Swimming is not officially encouraged at the dam site. Informal swimming spots exist along certain shores, but check with locals on-site first.
A few modest guesthouses and resorts operate in Sirindhorn District. More substantial hotel options are available in Ubon Ratchathani, roughly 70 km away.
Yes, both sites are in the same province and relatively close. A full day by car allows you to visit the dam in the morning and Pha Taem in the afternoon.
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