Dibru-Saikhowa National Park is a national park in Dibrugarh and Tinsukia districts, Assam, India. It was designated a Biosphere Reserve in July 1997 with an area of 765 km (295 sq mi), including a core area of 340 km (130 sq mi) and a buffer zone of 425 km (164 sq mi).
It is located at an average elevation of 118Â m (387Â ft), ranging from 110 to 126Â m (361 to 413Â ft). The park is bounded by the Brahmaputra and Lohit Rivers in the north and Dibru River in the south. It mainly consists of moist mixed semi-evergreen forests, moist mixed deciduous forests, canebrakes and grasslands. It is the largest salix swamp forest in north-eastern India, with a tropical monsoon climate with a hot and wet summer and cool and usually dry winter. Annual rainfall ranges from 2,300 to 3,800Â mm (91 to 150Â in). It is a haven for many endangered species and rich in fish diversity.