Trnovačko Lake (Bosnian, Serbian and Montenegrin: Trnovačko jezero, Трновачко језеро) is a lake in northern Montenegro, best known for its heart-like shape. Located at an altitude of 1517 metres, it is popular with local summer campers. It is 700 metres (2,300 ft) long and 400 metres (1,300 ft) wide set amidst a "huge amphitheater of rocky peaks". The lake is drained from the Maglić, the Volujak and the Bioč hill ranges. The north side of the lake which is open has the wooded Vratnice. The lake water has a deep green-blue colour.
- Jugoslavenska akademija znanosti i umjetnosti (1931). Ljetopis Jugoslavenske akademije znanosti i umjetnosti. Jugoslovenska akademija znanosti i umjetnosti. Retrieved 19 July 2011.
- McAdam, Marika (1 April 2009). Lonely Planet Western Balkans. Lonely Planet. p. 146. ISBN 978-1-74104-729-5. Retrieved 19 July 2011.