Gurudongmar Lake is one of the highest and actually the largest lake of the state of Sikkim. This lake is also popularly known as Gurudogmar Lake. This highest lake of the world is located at a height of 17,100 ft (5,210 m). It lies in the region of North Sikkim and is only around 5 kilometres south of the Chinese border. The first appearance of serene and calm waters of Gurudongmar Lake gives a relieved sense. This lake is on the northern edge of the Khangchengyao Range and is in a tall plateau area that is just next to the Tibetan Plateau. Gurudongmar Lake or Gurudogmar Lake is a channel of high admiration for the Buddhists and the Sikkimese.

Gurudongmar Lake is a fresh-water lake and is located northeast of the Kanchenjunga Peak. This lake actually provides one of the main source streams of the Teesta River. The Gurudogmar Lake remains totally frozen in the winter season that is from November to Mid-May, except a small part, which is believed to have been sanctified and blessed by Guru Padmasambhava. Interestingly, this lake obtained its name from Guru Padmasambhava, the Buddhist who performed rituals here, who is also known by the popular name of Guru Dongmar. This sacred lake is visited by innumerable pilgrims annually. It is said that the waters of Gurudongmar Lake have curative and healing properties. There is `Sarva Dharma Sthal`, which is the `House of worship for All Religions`, close to this lake where people spend time in peaceful meditation. Guru Nanak also visited this popular lake of North Sikkim.

The way that leads to Gurudongmar Lake is considered as quite complicated and that is why very few people could visit it annually. The main reason behind such a less visit is severe inhospitable topography and the complexities associated with reaching the Gurudogmar Lake. Moreover, access or right to entry is stringently restricted at the Army check post at Giagong. Owing to its high altitude, there is scarcity of oxygen. The visitors of this lake are advised not to stay at this place overnight. Thus, apart from its ecological cons, Gurudongmar Lake is a magnificent place to visit and explore the majesty of the nature.