Sikkim is a very small hilly state in the Eastern Himalayas, extending approximately 114 Kms from north to south and 64Kms from east to west, surrounded by vast stretches of Tibetan Plateau in the North, Chumbi Valley of Tibet and the kingdom of Bhutan in the east, Darjeeling district of West Bengal in the south and the kingdom in Nepal in the west.

The state being a part of inner ranges of the mountains of Himalayaa has no open valley and no plains but carries elevations ranging from 300 to 8583 mtrs above means sea level consisting of lower hill, middle and higher hills, alpine zones and snow bound land, the highest elevation 8583 meters being the top of the Mt. Kangchendzonga itself.