Yen Bai Province
- Area: 6,882.9 sq. km.
- Population: 731,800 habitants (2005)
- Capital: Yen Bai City.
- Town: Nghia Lo
- Districts: Luc Yen, Van Yen, Mu Cang Chai, Tran Yen, Yen Binh, Van Chan, Tram Tau.
- Ethnic groups: Viet (Kinh), Tay, Dao, H?Mong…
Situated on the gateway to North-West Vietnam. Yen Bai City is 180km from Hanoi. Annual average temperature is from 18ºC to 28ºC. Yen Bai has artificial Thac Ba Lake, a scenic spot as well as a historical place. Coming to there, tourists are able to relax in the lake, climb the mountain and explore the forests.

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Attractions |
Thac Ba Lake
Located both in Luc Yen and Yen Binh districts, Yen Bai Province. Thac Ba Lake is not only a beautiful landscape, but it is also a national vestige. This artificial lake has an area of 23,400ha and 1,331 islands and hills with diverse ecological environments. The water in the lake is blue and clear, and imprinted with the reflections of the surrounding ancient forest. The thousands of hills and islands feature caves such as the Hum, Cau Cuoi and Bach Xa.
Thac Ba Temple
Thac Ba Temple (Mother Temple) was built into Hoang Thi Mountain and faces the Chay River. Standing here from the height of 70 m above the foot of the mountain, tourists can observe Thac Ba town and its surrounding area. It relates to a legend that says Ngoc Hoa Princess, daughter of the 18th King Hung, worshipped in the Thac Ba Temple. The festival includes a feast to celebrate the Mother Goddess (January 8-9); and another party is held on October 10. At Thac Ba Lake, the biggest man-made lake in Viet Nam, tourists can enjoy the beauty of the Mother Temple, while relaxing in nature.