Theulacha is located in North Sikkim District of Sikkim. It lies on the banks of the Thomphyak Chuu and is perched at an altitude of 16,400 ft. Theulacha is around 44 km north-west of Mangan.
Theulacha offers stunning view of the Mount Kanchenjunga and the surrounding deep valleys. Theulacha Pass, on Green Lake-Muguthang trek route, is located here.
