Bohinj Lake is the largest permanent and natural lake in Slovenia. The lake's surface is at an altitude of ~ 525 m. The lake is 4350 m long (the longest diagonal), the largest width (S-J) is 1250 m and the deepest part of the lake is 45 m - the surface of the lake is 318 ha. The length of the lake is 10,900 m.
The lake is a glacial-tectonic origin: the original basin was created by the intense erosion of the glacier to the surface. The glacier hollowed the bottom and surrounded it with frontal moraines in the eastern part of the lake. The main tributary of the lake is the Savica, which in the western part of the lake basin breaks through the moraines with boulders and flows into the lake at Ukanc. The lake is flowing - from the lake the Jezernica River flows, which, after less than 100 m, joins with the Mostnica (flowing from Voj) to form the Sava Bohinjka river. At the northern edge of the lake there are several underwater karst springs, the most famous being the karstic spring Govic.
Interestingly, the level of the lake was 16 m higher at the end of the last ice age, and at that time the lake reached the present-day settlement of Stara Fužina, as indicated by the local fossil lake terraces. Bohinj Lake was included in the Triglav National Park area in 1981. A beautiful view of the lake is from the peak of the Mirnjak cliffs (1540m).
Literature: Firbas P., 2001. All Slovenian Lakes: Lexicon of Slovenian Standing Waters, Delo, pp. 84-88; Kunaver J., 1999. Slovenia - Landscape and People, Mladinska knjiga, p. 60; Sketch of the lake: photograph of the TNP information board, February 2004.