Kozjak

verified Ungraded High flood risk Kobarid, Soča Valley

Aggressive 4C2 limestone descent in the upper Kozjak drainage, finishing above the famous waterfall amphitheater near Kobarid.

Materially harder than Sušec across the valley. The v4a5 II grade flags it as a step up in commitment, primarily because of sustained swift water rather than vertical exposure. The Kozjak Slap itself (the 15 m waterfall in the cathedral pool downstream) is a walking destination on its own and not part of the canyoning descent.

Logistics

Manager	Triglav National Park / Občina Kobarid
Permit	No permit required. Standard Triglav NP conduct rules apply.
Distance	1.4
Elevation	~213 ft loss in descent
Time	2-3 hr (45 min approach, 2 hr descent, 5 min exit)
Technical	Limestone tributary of the Soča near Kobarid, ending above the famous Kozjak waterfall amphitheater. Ropewiki rates 4C2 II (v4a5 II), making it materially harder and wetter than nearby Sušec. Longest rappel about 66 ft. Significant swift-water hazard; aquatic grade 5 of 7. Wetsuit mandatory year round, Soča-system water runs cold.
Season	Summer (Jun-Sep) primary; viable in shoulder seasons with cold-water gear.
Flood risk	Moderate to high. Tight drainage off the surrounding ridges; flow spikes fast on rain. The base Kozjak waterfall amphitheater is the tourist destination, so flow gauges and conditions are well watched locally.
Vehicle access	2WD, paved to Kobarid trailhead
Crowd	The walking trail to the Kozjak waterfall is one of the most popular day hikes in the Soča Valley. The canyoning descent above is less trafficked but sees guided parties in season.
Coordinates	46.2614, 13.5918

Sources

ropewiki: https://ropewiki.com/Kozjak