The Sutjeska National Park is a national park located in Bosnia and Herzegovina in the Republika Srpska entity. It is Bosnia and Herzegovina 's oldest national park. It includes the highest peak of Maglić at over 2,386 metres (7,828 ft), on the border with Montenegro. The Montenegrin part of Maglić massif in the park has also formed the Trnovačko Jezero (Trnovačko Lake). The Strict Nature Reserve “Perućica”, one of the last two remaining primeval forests in Europe, is part of the park.