Kotlaničko Lake on Zelengora, on 1528 m, is with a magnificent landscape an is one of the most beautiful lakes on Zelengora. It is teeming in fish, especially Carr (salvelinus alpinus), and is home to endemic amphibian of triton. It is surrounded by the peaks of: Dumoš (1882 m), Prutača (1817 m), Klek (1899 m) and Zimovnica (1742 m). In length it is around 300 m, and in width around 350 m. The depth is up to 10 m. You can reach it by driving on a dirt road from for 21 km towards Orlovačko and Borilovačko Lakes with another 2 hours of walking on a larked trail going left from the road.