Ba Bể National Park is a reserve in Bắc Kạn Province, Northeast region of Vietnam, set up to protect a freshwater lake (Ba Bể Lake) along with surrounding limestone and lowland evergreen forests. It is located about 240 kilometers northwest of the capital city Hanoi.
Ba Be (meaning Three Bays) is in fact three linked lakes, which have a total length of 8km and a width of about 400m. More than a hundred species of freshwater fish inhabit the lake. Two of the lakes are separated by a 100m-wide strip of water called Be Kam, sandwiched between high walls of chalk rock.
The best time to visit Ba Be Lake is during the dry season (winter and spring). In the wet season, the lake takes up water from the Nang River and regularly flooded. If travel at the time of Long Tong Festival on the 10th and 11th days of the first lunar month, there are traditional games and performance of surrounding ethnic tribal groups.