Dudhwa National Park is located in Uttar Pradesh. It is a protected area in the Terai region of the state and is spread across the Lakhimpur Kheri and Bahraich districts.

Key Points:
1. Location: Dudhwa National Park is situated in the northeastern part of Uttar Pradesh, near the border with Nepal. It is approximately 220 kilometers away from Lucknow, the capital city of the state.

2. Geographical Features: The national park is part of the Indo-Gangetic plains and is characterized by a unique ecosystem. It is situated in the Terai region, which is a low-lying area with marshes, grasslands, and dense forests.

3. Flora and Fauna: The park is known for its rich biodiversity. It is home to a variety of plant species, including sal, teak, khair, and sisam. The park is also home to several endangered and rare animal species, such as the Indian rhinoceros, Bengal tiger, swamp deer, and hispid hare.

4. Avian Diversity: Dudhwa National Park is a paradise for birdwatchers. It boasts a diverse range of avian species, with over 400 species of birds reported in the park. The park is particularly famous for its population of the endangered Bengal florican.

5. Conservation Efforts: Dudhwa National Park was established in 1958 as a wildlife sanctuary and later upgraded to a national park in 1977. It is a protected area under the Indian Wildlife Protection Act of 1972. The park is managed by the Uttar Pradesh Forest Department and various conservation initiatives have been undertaken to preserve its biodiversity.

6. Tourist Attractions: Apart from its wildlife, Dudhwa National Park also offers several tourist attractions. Visitors can explore the park through jeep safaris and elephant rides. The Dudhwa Tiger Reserve, located within the national park, is a major attraction for wildlife enthusiasts. Other popular attractions include the Shishambara Tal, Kakraha Range, and Sathiana Range.

In conclusion, Dudhwa National Park is located in Uttar Pradesh and is known for its diverse wildlife and rich biodiversity. It is a popular destination for nature lovers and wildlife enthusiasts, offering a unique experience in the Terai region of the state.