Dzongu in North-West Sikkim near Mongan, the district head quarter, is a restricted Lepcha territory. The area, used to be treated as forbidden for the outsiders even few years back, has been reserved exclusively for the Lepcha community, the original inhabitants of Sikkim. Lying at the close proximity to the Kanchendzonga Biosphere Reserve at an elevation ranging between 3000ft and 20,000ft above sea level, Dzongu is an unpolluted and least trodden territory in Sikkim Himalayas. Still uninfluenced of modern civilization the traditional Lepcha Communities in Dzongu live in relative isolation from the outside world with their own traditional practice and believe.
Most part of Dzongu is forested region and fed by two important rivers, the Teesta and Tolung. Nestled in the shadow of Mt Kanchenjunga and the icy castle of Mt Siniolchu, the region offers some fabulous high altitude treks in the Kanchenjunga reserves. A number of treks can be organised in the area. The most important trek originates from Dzongu is Tolung- Green Lake trek in North Sikkim. This is one of the most strenuous treks in Sikkim, which crosses some of the highest passes over 17000ft at Kishongla and Kishongda.
Most of Dzongu region is still unexplored because of its inaccessibility and the forests in these area has a rich variation of flora and fauna.
