The Bosna River has created the Bosna River Valley. The valley has been developed as the country's industrial hub and is home to nearly a million people, who live primarily in several major cities.
Vrelo Bosne and Mala Bosna The Bosna source is the Vrelo Bosne spring, located at a.s.l. (according to an earlier source, a.s.l.) at the
foothills of mount
Igman, on the outskirts of Sarajevo, capital of Bosnia and Herzegovina. The course between the source and its largest tributary in this section, the
Željeznica, which runs in from the right, is referred as the Mala Bosna (), but the section is often extended all the way to its confluence with Miljacka, four kilometers downstream. Its tributaries between the source and the Željeznica are first the
Večerica and then Bukulaš, while in the region of extended Mala Bosna course it further receives, first the Željeznica from the right, then approx. 600 meters downstream the
Zujevina, the only tributary from the left in this region, followed by the
Dobrinja (a.k.a.
Tilava) 1.5 km, and then 2 km further the
Miljacka, both from the right.
Upper Bosna The Upper Bosna is a section between its source and the mouth of the
Lašva, a left tributary, just upstream from
Zenica. The section encompasses the entire region between
Ilidža, near
Sarajevo, and the Lašva, including the spacious valley between
Ilijaš and
Kakanj. The
Visoko region, with its medieval heritage, is at the center of this area.
Middle Bosna The Middle Bosna is mostly composed of
gorges, with steep slopes and narrow passages, between Zenica and
Doboj. In this section, there are several medieval sites, such as
Vranduk,
Maglaj and
Doboj.
Lower Bosna The Lower Bosna is the last section of the Bosna. From Doboj, the river continues northwards, approaching the
Sava through the heart of
Bosnia, passing through the lowlands of
Posavina, and eventually becomes a right
tributary of the Sava in
Bosanski Šamac. There, it empties at around above the sea level. == Course and tributaries==