Volujak is a mountain range on the border of Bosnia and Herzegovina and Montenegro, within the entity of the Republika Srpska. Geologically, Volujak is a subrange of the Dinaric Alps and formed largely of secondary and tertiary sedimentary rock, mostly limestone and dolomite. It basically forms a long ridge on the southwest side of the Suhja valley, with the border between Bosnia-Herzegovina and Montenegro running alongside this ridge, where a sharp corner of BiH territory reaches into Montenegro. It is on the BiH side located within the Sutjeska National Park but has a protected status also on the Montegrin side. Notable peaks are Volujak (2,337 metres (7,667 ft)), Studenac (2,296 metres (7,533 ft)), Badnjine (2,245 metres (7,365 ft)) and Trnovacki Durmitor (2,232 metres (7,323 ft)). Right at the northern foot of this last peak is the beautiful Trnovacko Lake situated. The Volujak range borders north-east on the Suhja valley and Maglic, on the south west side on the Izgori valley and the Lebršnik mountain group, in the north west by the Sutjeska (river) valley and on the south east side by the Bioc range. Volujak peak is the second highest elevation point in Bosnia Herzegovina.