Dehing Patkai National Park, National park in Tinsukia district, India

Dehing Patkai National Park covers 231.65 km2 of lowland rainforest in the Dibrugarh and Tinsukia districts of Assam, the largest stretch of such forest in India. Its four-layered canopy is dominated by the Hollong tree, Assam's state tree, which rises above the emergent layer. The undergrowth holds ferns, epiphytes, wild banana, orchids, arums and lianas, and the forest type is classified as Upper Assam Valley tropical evergreen forest.

The government declared the territory a wildlife sanctuary in 2004 and elevated its status to a national park in 2021 after decades of efforts to curb illegal logging and protect threatened species in this ecologically sensitive region.

More than a dozen ethnic groups live around the park, among them Tai Phake, Khamyang, Khampti, Singpho, Nocte, Chutia, Ahom, Kaibarta, Moran, Burmese and Nepali communities. Tea tribes were brought by the British to work the plantations. The Dehing Patkai rainforest festival draws visitors and presents both biodiversity and these cultures.

November through April offers optimal conditions for exploration with moderate temperatures and low precipitation, while local tour operators organize guided treks and accommodations are available in nearby towns.

The park is called the "Amazon of the East" for its size and dense forest cover. It also holds World War II burial sites, the Stilwell Road and Asia's oldest oil refinery at Digboi, all within the same region.