The reservoir was formed by damming the Đồng Nai River, with construction starting in 1984 and completion in 1987.
The hydroelectric plant built here was a major joint project between Vietnam and the former Soviet Union.
The water surface area changes dramatically between the rainy season and the dry season, revealing expansive grassy banks during low-water months.
It is a key habitat for various migratory bird species due to its proximity to the UNESCO-recognized Cát Tiên biosphere reserve.
Hồ Trị An is a massive man-made reservoir covering approximately 323 square kilometers, created to supply water for the Trị An Hydroelectric Power Plant. Located in Đồng Nai province, it serves as a critical buffer zone for the nearby Cát Tiên National Park. The lake features over 40 small islands, the most prominent being Đảo Ó and Đồng Trường, which are accessible by boat. The landscape is characterized by expansive open water surrounded by dense secondary forests and plantations. It functions as a primary recreational site for locals seeking camping, fishing, and boating activities. The water levels fluctuate significantly depending on the seasonal discharge for hydroelectric power generation.
The elevated viewing area overlooking the main dam spillway during sunset.
Bring a portable power bank and plenty of drinking water, as facilities are sparse on the islands.
Check the local weather forecast specifically for the Vĩnh Cửu district, as open water areas are prone to sudden afternoon squalls.
Wear light, breathable clothing and high-SPF sunscreen, as shade is extremely limited near the shoreline.
Do not attempt to swim in areas near the power plant or marked underwater obstruction zones due to strong currents and submerged trees.
Practice 'Leave No Trace' camping; pack out all trash as there are no waste management facilities on the islands.
