Tsomgo Lake is a riot of colours, and takes different forms in different seasons. While winter brings visitors to a frozen stretch of ice, instead of a lake, with snow all around it, spring arrives in full bloom to cover the surrounding area of the clean water with a profusion of flowers. Taking the winding road through rugged terrain, over mountains, turning on sharp cliffs, to arrive at this beautiful lake, is an adventure in itself. There is also a provision to take rides on yaks and mules here; you can even sample some of the delicacies of the state at any of the stalls that are usually present. If you're not carrying the appropriate gear for traversing the snow, you can rent gumboots and snow boots from tiny shops near the lake.

Tsomgo is open to all tourists, but foreign nationals will have to travel in groups of two or more to apply for a visitor's permit to access the area with a registered travel agency.

Tsomgo, meaning source of water in Bhutanese, lies at an altitude of 3,779 m, on the way to Nathu la Pass. At a distance of 38 km from Gangtok, Tsomgo Lake, also known as Changu Lake, is a must-visit spot. It receives its water from the melting snow of the surrounding mountains.

The lake is associated with a number of legends - the most quoted of these talks of Buddhists monks who would ostensibly study the colour of the lake to make predictions for the future. It is also quite special for the Jhakris (healers in Bangladeshi), as on Guru Purnima (coinciding with Raksha Bandhan), they come together from all over the state to pray.