Forming from two tributaries—Krông Nô and Krông Ana rivers in the western side of the
South Annamite Mountain Range in Vietnam's Central Highlands province of
Đắk Lắk—the Srepok runs through
Krông Ana,
Buôn Đôn, and
Ea Súp districts to the west. Just entering the territory of Cambodia, the Srepok is joined by the
Ea H'leo and
Ia Drang rivers. In Cambodia, it runs through the
Ratanakiri and
Stung Treng provinces. In Stung Treng, it enters the
Tonlé San River, just 23 miles upstream from the confluence where the Tonlé San joins the
Mekong. The
Lower Se San 2 Dam was recently built at the confluence of the Srepok and Tonlé San rivers. The river's course from the confluence of Krông Nô and Krông Ana rivers to the Vietnam–Cambodia border is approximately 126 km. From the border to Stung Treng is about 281 km. ==Usage==