restricted area it is essential for all Indians visiting the area to obtain permits. In case of foreign nationals special permit is essential. Indian Postal Service released a commemorative stamp on the lake on 6 November 2006. Border trade market The nearby habitation of Changgu was declared a border trade market in 2003. Gallery See also Tilicho Lake Gurudongmar Lake Nathu La Tourist Attraction It is one of the biggest tourism draws in the Eastern Himalayan state of Sikkim receiving around 300,000 (3 lakh) tourists annually. The best time to visit the lake is January to March. References Tsomgo Lake travel guide - Permit Regulations Climate Temperature Bibliography Tsongmo Gangtok district Tsongmo