The largest natural freshwater lake in Northeast India is:

Loktak Lake
Wular Lake
Dal Lake
Umiam Lake

The largest natural freshwater lake in Northeast India is Loktak Lake. It is located in the Manipur state of India. The lake is a Ramsar site and a national park. It is home to a variety of wildlife, including the endangered sangai deer. The lake is also a popular tourist destination.

Wular Lake is the second largest lake in Jammu and Kashmir. It is located in the Baramulla district of the state. The lake is a Ramsar site and a national park. It is home to a variety of wildlife, including the endangered Kashmir stag. The lake is also a popular tourist destination.

Dal Lake is a lake in Srinagar, the summer capital of Jammu and Kashmir. It is a popular tourist destination. The lake is home to a variety of wildlife, including the endangered Kashmir stag.

Umiam Lake is a lake in Meghalaya. It is the largest artificial lake in the state. The lake is a popular tourist destination. It is also a source of water for irrigation and drinking water.

In conclusion, the largest natural freshwater lake in Northeast India is Loktak Lake. It is located in the Manipur state of India. The lake is a Ramsar site and a national park. It is home to a variety of wildlife, including the endangered sangai deer. The lake is also a popular tourist destination.