Nestling at the foothills of the Himalayas, Assam is known as the land of Blue hills and red rivers. The State has got a resource of fertile valleys, dense forests, numerous rivers, lofty hills and lovely undulating plains. The mighty river Brahmaputra, which is also one of the four largest rivers of the world, along with its tributaries, is nourishing it from time immemorial. The long range of hills from East to west have divided her into two major valleys called Brahmaputra and Barak or Surama valley. In between these valleys lie the Barail mountain range Rengma and Karbi hills with full of dense forest and rare species of wildlife.
The Brahmaputra Valley in Assam is approximately 80 to 100 km wide and almost 1000 km long. The width of the river itself is 16 km at many places within the valley. Most parts of the state are plains, except for Karbi Anglong, North Cachar and some parts of Guwahati which are hilly regions.
Assam is famous for its tea. Assam tea is relished throughout the world. Tea plantations were started by the British after the discovery of Camellia Sinensis in 1834 in Upper Assam. The Upper Assam districts of Dibrugarh, Tinsukia and Jorhat have the ideal soil and climatic conditions for tea.
Assam is one of the richest biodiversity hotspots in the world and consists of tropical rainforests, deciduous forests, riverine grasslands, and numerous wetland ecosystems. Famous for Kaziranga and Manas National Parks, both of which have now been declared world heritage sites by UNESCO. Besides these two there are several other parks and sanctuaries like Nameri, Orang, Pobitara, Dibru-Saikhowa, Garampani interlaced all over Assam. Assam si now the last refuge to many endangered species like Indian Rhinoceros, Golden Langur, White-Winged Wood Duck, Bengal Florican, Black-breasted Parrotbill, Pygmy Hog, and Greater Adjutant Stork.
Assam experiences a wild and moderate type of climate, never given to extreme cold or heat. Summer season is from March to June, monsoon from July to August and November to February is winter. The maximum temperature goes upto 35 degree C in summer and minimum is about 16 degrees C in winter. The annual rainfall varies from 70 inches in the West to 120 inches in the East. Winter and Spring i.e. from October to April are the best season to visit Assam.