Gurudongmar Lake is one of the highest lakes in the world and in India, at an elevation of 5,430 m (17,800 ft) according to the Government of Sikkim. It is located in the Great Himalayas in the Mangan District in Indian state of Sikkim, and considered sacred by Buddhists and Sikhs. The lake is named after Guru Padmasambhava—also known as Guru Rinpoche—founder of Tibetan Buddhism, who visited in the 8th century.

Sikkim is a state in northeastern India. It borders the Tibet Autonomous Region of China in the north and northeast, Bhutan in the east, Koshi Province of Nepal in the west, and West Bengal in the south. Sikkim is also close to the Siliguri Corridor, which borders Bangladesh. Sikkim is the least populous and second-smallest among the Indian states. Situated in the Eastern Himalaya, Sikkim is notable for its biodiversity, including alpine and subtropical climates, as well as being a host to Kangchenjunga, the highest peak in India and third-highest on Earth. Sikkim's capital and largest city is Gangtok. Almost 35% of the state is covered by Khangchendzonga National Park – a UNESCO World Heritage Site.