Tamblian Lake is a lake located on the north slope of Mount Mortar, Munduk Village area, District of Banjar, Buleleng, Bali, Indonesia. This lake is one of the three twin lakes that formed in a large caldera. To the east there is a row of Lake Buyan and Lake Beratan.
On the edge of the Tamblingan Lake there is a Gubug Temple. Unfortunately due to heavy rainfall and flooding the surface of the lake rises the temple. The lake is surounding by forest which clove and coffee trees can be found everywhere.