Sutjeska National Park, National park in Foča, Bosnia and Herzegovina

Sutjeska is a national park in Foča, Bosnia and Herzegovina, covering 17,250 hectares of mountain land with thick forests, glacier-fed lakes, and the peaks of Maglić, Volujak, and Zelengora. The park protects old-growth wilderness and shows different altitude zones, from deep valleys to summits above 2,000 meters (6,500 feet).

Sutjeska was declared a national park in 1962, the first in Bosnia and Herzegovina; sources note the designation owed more to the site of the 1943 Battle of the Sutjeska than to conservation. The Perućica forest reserve had been protected since 1952 as a natural reserve for scientific and educational purposes. From 15 May to 16 June 1943, Partisans led by Josip Broz Tito broke out of encirclement by German forces at the cost of a third of their men.

The memorial complex at Tjentište, on the northern edge of the park, includes large stone monuments to the Partisans who broke out of encirclement in the 1943 Battle of the Sutjeska. The valley is the starting point for the road to the Perućica reserve. The name Tjentište is not Roman; the sources record no Latin origin.

The park is open most of the year, with some restrictions in winter. It lies 110 kilometres (68 miles) from Sarajevo and 142 kilometres (89 miles) from Dubrovnik by road; the Foča–Trebinje road runs along the canyon walls through thick forest. Foča is 20 kilometres (12 miles) from the park, and the nearest town is Mratinje. The valley opens at the northern edge of the park.

The Skakavac waterfall, about 75 metres high, drops from the Perućica creek over a limestone ridge deep inside the reserve. The Perućica primeval forest is estimated to be 20,000 years old, and some trees exceed 300 years. Yale University researchers considered it an ideal site for studying forests' role in the global carbon cycle.