Thao River

Thao River
Thao River in Cam Khe District, Phu Tho Province, Vietnam
Native name	Sông Thao
Country	China, Vietnam
Basin features
Main source	Weishan Yi and Hui Autonomous County, Yunnan Province, China 547 m (1,795 ft)
Basin size	51,800 km2 (20,000 sq mi) (China: 39,800 km2 (15,400 sq mi), Vietnam: 12,000 km2 (4,600 sq mi))
Physical characteristics
Length	910 km (570 mi)

Thao River (Vietnamese: sông Thao) is the upper stretch of the Red River, originates from Weishan Yi and Hui Autonomous County, Yunnan Province, China, flows through three Vietnamese provinces, including Lao Cai Province, Yen Bai Province and Phu Tho Province. Thao River merges with Black River and Lo River at Viet Tri City, Phu Tho Province, Vietnam.

The river is known for Song Thao Campaign by Viet Minh in 1949, during the First Indochina War. The campaign started on 19 May and ended on 18 July, with the victory of Viet Minh over the French.