The Dudhwa Tiger Reserve is a protected area in Uttar Pradesh that stretches mainly across the Lakhimpur Kheri and Bahraich districts and comprises the Dudhwa National Park, Kishanpur Wildlife Sanctuary and Katarniaghat Wildlife Sanctuary. It covers an area of 1,284.3 km2 (495.9 sq mi) and includes three large forest fragments amidst the matrix dominated by agriculture. It shares the north-eastern boundary with Nepal, which is defined to a large extent by the Mohana River. The area is a vast alluvial floodplain traversed by numerous rivers and streams flowing in south-easterly direction. It ranges in altitude from 110 to 185 m (361 to 607 ft).