One of the two branches of the upper Sava river basin is Sava Bohinjka which carved its bed in the heart of the Julian Alps. The upper part of its flow (to Laški Rovt) is also protected as part of the Triglav National Park.
The section from the source to the point where Sava Bohinjka gets its name is very rich in water as well. The water from the Triglav mountains comes out in the valley in form of the most visited Slovenian waterfall, the 71-metre-high Savica Waterfall. From underneath Komarča, the water continues its path as Savica into Lake Bohinj. It flows out from Lake Bohinj under the famous bridge by the Church of St. John the Baptist as the Jezernica river which is joined after only a hundred metres by the mountain stream Mostnica. It is only here that it gets the name Sava Bohinjka.
The Sava Bohinjka river is fascinating due to its relative intactness. After 150 metres, it penetrates a limestone ridge through a short but picturesque gorge. It then continues at a fairly steady pace towards the east past the villages of Bohinj area, past Bohinjska Bistrica (where it is joined by Bistrica) and over the gravelly layer of glacial flood material all the way to Nomenj. Here it turns towards the north and continues at a slightly faster pace through a torrent-defined Soteska between Jelovica and Pokljuka. Once in Bled, it turns once again towards the east where it soon meets its “sister” Sava Dolinka under the dam in Radovljica.
Like Lake Bohinj, Sava Bohinjka too was formed by the glaciers. The riverbed contains larger and smaller gravel pits. In addition, it also has several typical dead river branches. Most of these can be found in the section between Bohinjska Bela and Sava Dolinka confluence. The connoisseurs will undoubtedly find the most interesting the dead river bad under the settlement Selo pri Bledu which is located about 100m away from the river and is rich with the flora and fauna adapted to such habitats.
Sava Bohinjka is known to be more water-rich than Sava Dolinka despite having a smaller river basin. It has one of the water-richest upper part of a river basin in Slovenia.
Sava Bohinjka flows through or past the following villages in Bohinj: Ribčev Laz, Laški Rovt, Polje, Kameje, Brod, Savica, Bohinjska Bistrica, Bitnje, Log, Lepence and Nomenj. A lot of cultural and natural as well as current points of interest can be found on its way through the Bohinj area (Savica Waterfall, hydroelectric power plant Savica, Lake Bohinj, Church of St. John the Baptist, Camp Danica, Bohinjska Railway, Grmečica Waterfall, Pirašica Waterfall, Soteska Waterfalls, Hemin plavž Furnace, Pantz Cableway, hydroelectric power plant Soteska, etc.).
The Sava Bohinjka river is perfect for all kinds of activities: fly-fishing, rafting, kayaking, canoeing, and in the summer months even swimming (although its temperature rarely exceeds 20 °C).