Lake Kozjak
Nestled in wooded gorges above Kobarid, Lake Kozjak enchants with its turquoise waters fed by a waterfall. A short and accessible hike in the Soča valley.
Lake Kozjak hides within wooded gorges above Kobarid, in the Soča valley. Fed by a waterfall that plunges into a turquoise basin, this mountain lake is one of the rare places in Slovenia where the water's color rivals that of the Soča itself. The short hike leading there makes it an accessible excursion from the village.
Quick practical info
- Access: marked trail from Kobarid, starting near the bridge over the Soča
- Recommended duration: 1 hour 30 minutes to 2 hours round trip
- Admission: paid (trail maintenance fee collected in season)
- Gear: hiking shoes recommended, the trail crosses rocky passages
- Swimming: permitted in the lake
What you'll see
The lake occupies a natural basin carved into limestone rock. A waterfall drops directly into the lake from the cliff face, creating a pool of cold water with an intense blue-green hue. Dense vegetation—beech and maple trees—frames the site. The trail also passes through the narrow, humid Kozjak Gorges before reaching the lake.
History and context
The Soča valley was the scene of fierce fighting during World War I (Isonzo Front). The area around Kobarid, including the Kozjak Gorges, is classified within the Triglav regional park. The natural site is managed to limit the impact of growing tourism.
Highlights of your visit
The waterfall and basin
The water cascade that feeds the lake is the pinnacle of the trail. The cold, translucent water contrasts with the dark rock. In summer, swimming in the basin is possible; the water remains cool even at the height of the season.
The Kozjak Gorges
Before reaching the lake, the trail descends into narrow gorges carved into limestone. Wooden walkways run along the rock face above the stream. This passage is one of the most spectacular sections of the hike.
Views over the Soča valley
On the way back, breaks in the forest offer views of the valley and the surrounding Julian Alps peaks.
Photography tips
Morning light, before the sun gets too high, illuminates the waterfall without backlight. At midday, diffuse light beneath the canopy works well for lake photos. Avoid July-August weekends for shots without crowds.
Location and access
The trailhead is located a few minutes' walk from the center of Kobarid. From the village, follow signs toward the Soča and then the markings toward Kozjak. No direct public transport to the trailhead; Kobarid is accessible by bus from Tolmin. Disabled access is not possible due to rocky terrain and walkways.
In the surrounding area
- Kobarid Museum — award-winning museum dedicated to the Isonzo battle, a few minutes' walk in the village.
- Soča River — iconic waterway with emerald waters, ideal for kayaking and fly fishing.
- Napoleon Bridge (Kobarid) — historic bridge over the Soča, starting point for several trails.
Frequently asked questions
From May to October, the trail is passable. In June and September, crowds are lighter and weather conditions often favorable. In winter, the trail can be slippery and partially closed.
Yes, swimming is permitted. The water is very cold even in summer, as it is fed by mountain springs and a waterfall.
No, this is an easy to moderate hike. The passage through the gorges features wooden walkways and some steps carved into the rock. Hiking shoes are sufficient.
Yes. The Kobarid Museum and the World War I historical trail are easily visited on the same day, before or after the hike to the lake.
No known restrictions for photography. Drone use is subject to Slovenian regulations in areas of the Triglav regional park.
Interested in this visit?
We can include it in your personalised itinerary.