The Thạch Hãn River is a river in Quảng Trá» province, Vietnam. It rises in the Annamite Mountains, and enters the South China Sea east of ÃÂông HÃÂ. It is approximately long, with two main tributaries and with several branches to the sea.
The Thạch Hãn river is formed by the confluence of two rivers which rise in the western highlands of Vietnam; the ÃÂakrông, which flows from the south-west through ÃÂa Krông District, and the Rào Quán, which rises in the mountains north of Khe Sanh.
In the plains the river is joined by three main left bank tributaries; the ÃÂi Tá»Â, the Vénh Phðá»Âc, and the Hiếu, known in its upper reaches as the Cam Lá»Â. The river enters the sea at Cá»Âa Viá»Ât, east of ÃÂông Hàcity.
The Thạch Hãn is also connected by distributaries to the Bến Hải River to the north, marking what used to be the Demilitarized Zone, and the àLâu to the south, which reaches the sea at the Tam Giang lagoon.