The Koritnica springs from several streams and torrents under Mangart, Kotovo sedlo and Jalovec. It flows into the Soča near Bovec, at Vodence.
At the Kluže fort in the Triglav National Park, the kilometre-long Koritnica canyon narrows into a gorge that is just a few metres wide, 70 m deep and some 200 m long.
The most interesting section of the Koritnica is at the Kluže gorge; over a stretch of 200 m, the river has carved out a narrow gorge that reaches depths of 70 m (Korita Kluže, also known as the Koritnica gorge), which is protected as a Slovenian natural treasure. Korita Kluže is an important strategic point that was used from the 15th century onwards as an observation post for arrivals in the Bovec basin.
Boating on the Koritnica
Korita Kluže is not suitable for water sports. A kayaking entry point is situated at the end of the gorge.
Recreational boating on the Koritnica and the use of the entry and exit points is governed by a Decree. Boating is permitted every day from 15 March to 30 October from 9:00 to 18:00 downstream from the Kluže entry point. Permits must be purchased for the use of the entry and exit points. The river difficulty level is III/IV.
Fishing on the Koritnica
The Koritnica is suitable for fly fishing from the bridge to the confluence with the Soča. The river is a part of a Catch and Release fishing area. Its blue-green pools are home to the indigenous marble trout and grayling.