It originates in the
Loi Mountains of
Laos, crossing Laos's
Xiangkhouang Province,
Vietnam's
Nghệ An and
Hà Tĩnh provinces and empties into the
Gulf of Tonkin, on the
North Central Coast of Vietnam, after a 512 km journey. The Cả River zone is classified as 300 km by the Vietnam Geographical Survey. The Bến Thủy bridge, crossing into Bến Thủy,
Vinh, crosses the Cả River on its
Cửa Hội estuary. ==See also==