Sumon is a Lepcha word and is a name of a Village just situated opposite hill of the Sang hill range.
History:The was monastery originally started with a Manilhakhang belonging to the Karma Kagyupa Sect and was established in wood-mouse year of 15th Rabjung cycle corresponding to 1924. It was founded by Lama Ngodub as a branch monastery of Phodang Gonpa, North Sikkim. It was later converted into a Gonpa in 1966. The main altar has a statue of the 16th Gyalwa Karmapa donated by Ruktek Gonpa and a statue of Buddha presented by Kharwang Tulku. It functions all the ceremonies throughout