The Tara () is a river in Montenegro and Bosnia and Herzegovina. It emerges from the confluence of the Opasnica and Veruša rivers in the Komovi Mountains, part of the Dinaric Alps of Montenegro. The total length is 146 km, of which 141 km are in or on the border of Montenegro,; it also forms the border between the two countries in several places. The Tara flows from south to north - north-west and converges with the Piva at the Bosnia and Herzegovina and Montenegro border between the villages of Šćepan Polje (Montenegro) and Hum (Bosnia and Herzegovina) to form the Drina river (a branch of the Danube watershed). The Tara River cuts the Tara River Canyon, the longest canyon in Montenegro and Europe and second longest in the world after Grand Canyon, at 78 kilometers in length and 1,300 meters at its deepest. The canyon is protected as a UNESCO World Heritage Site. A part of the canyon includes the Durmitor National Park. The river takes its name from the Illyrian Autariatae tribe, whose territory included the river valley in classical antiquity. Ecology Ichthyofauna The Tara river is rich in endemic salmonid fish species, huchen (Latin: Hucho hucho), otherwise globally endangered, and together with the river Drina and most of its tributaries, such as the Piva river before damming, the Bistrica, Ćehotina, Lim, Prača, Drinjača, Sutjeska, its still Europe's primer habitats and spawning grounds. Tourism and recreation Rafting is very popular on Tara River. It is also one of the most popular forms of recreation in Montenegro and Bosnia and Herzegovina. The one-day rafting route, from Brstnovica to Šćepan Polje is 18 km long and it takes Among the attractions of the area is Đurđevića Tara Bridge, on the crossroads between Mojkovac, Žabljak and Pljevlja. Rafting starts at Splavista from where one starts the adventure 100 km long in the most beautiful and exciting part of canyon. Already at the beginning the Tara, the waterfalls of Ljutica are seen and then, the rafter passes under the high Đurđevića Tara Bridge. The old Roman road can then be seen as rafters pass through the Lever Tara, "Funjički bukovi", and "Bijele ploče". "Nisovo vrelo" is the deepest part of the canyon at high. Further is the bottom of the mountain top, "Curevac" (1650 m), that rises above Tara as its "eternal guardian". Rafting trips meet the waterfalls of Draga and then