Son River (Vietnam)

This is about the river in Vietnam, for Son River in India, see Son River

Son River or Troc River (Vietnamese: Sông Son or sông Tróc) (lit. Lipstice River because its water is red in fooding seasong) is a tributary of Gianh River in Quang Binh Province, Bac Trung Bo, Vietnam. This river runs in the territory of Quang Binh Province. The uptream of this river with the length of 7729 m runs underground in limestone mountains of Phong Nha-Ke Bang National Park..^[1]. Son River makes confluenc with Gianh River near Ba Đồn town of Quang Trach District before emptying into South China Sea. .^[2]