The national park is situated at Darrang in Sonipur district of Assam on the northern bank of the Brahmaputra River. The park has 79 square kilometer area and this is alluvial flood plains that are also known as Mini Kaziranga Park. In 1915 Orang was declared a game reserve. The sanctuary was established in 1985 and but it was declared a national park on April 1999. Various man made water bodies are found in the park and its landscape is very beautiful so attract the visitors through the India. The national park has renamed and now it is also known as Rajiv Gandhi Orang National Park.
Mainly three sessions hit on the region that are summer, monsoon and winter and climate of the national park are subtropical monsoon climate. Monsoon session May to September and average rainfall is 120 inch. During the summer season temperature reach upto 30 degree Celsius so summer is too hot. Humidity in the park has also 66% to 95%. During the winter session maximum temperature will 25 degree Celsius.
Flora: - the park is very rich in natural vegetations, various type of forests are found as like Bombax Ceiba, Sterculia villosa, Dalbergia, litsaea polyantha, Zizypphus etc. but very interesting thing is that non aquatic grassland species also found as like Saccarum spp, Phragmites Karka, Arundo donax etc.
Fauna: - One Horned Rhinoceros is main dominated species but other various species are also found in the region as like Royal Bengal Tiger, Asiatic Elephant, wild boar but small mammals also found and around 50 species of fish available in the park.
Reptiles: - Different types of reptiles are found as like Turtles and Snakes specially python and cobra.
Best time for visit specially months Octobers to April.
By road: nearest bus stops are Tezpur and Guwahati.
By rail: nearest railway stations are Saloni and Rangpara.
By Air: nearest airports are Salonibari and Guwahati.