Lachen is a town in Mangan District in the Indian state of Sikkim. The name Lachen means "big pass". The Sikkimese government promotes it as a tourist destination. The town forms the base to the Chopta Valley and Gurudongmar Lake. An annual yak race, the Thangu is held there in summer.
Unlike other places in India, Lachen has a unique form of self-governance, Dzumsa. From Wikipedia
