Mostnica

verified Ungraded Moderate flood risk Stara Fužina, Bohinj

A 2 hour limestone descent draining the Voje valley into Bohinj, distinct from the more famous Mostnica Korita walking gorge downstream.

Easy to confuse with the Mostnica Korita (Devil's Bridge) tourist gorge, which is a paid walking trail not a descent. The technical canyon is upstream in the Voje catchment. Triglav NP enforces standard conduct but does not require a canyoning permit here, unlike Fratarica.

Logistics

Manager	Triglav National Park
Permit	No specific canyoning permit required. Standard Triglav NP rules apply (no overnight camping, no fires, no off-trail damage).
Distance	1.2
Elevation	~394 ft loss
Time	2.5-3 hr (30 min approach, 2 hr descent, 10 min exit)
Technical	Limestone slot draining the Voje valley above Bohinj. Ropewiki rates 3C1 II (v2a4 II). Mix of rappels, slides, and short swims in the lower Mostnica gorge; the upper Mostnica Korita (the famous Devil's Bridge gorge) is the walking tourism section, the canyoneering descent is further upstream. Native grade v2a4 II (vertical 2, aquatic 4, exit 2).
Season	Jun-Oct
Flood risk	Moderate. Voje valley catchment is sizable and Bohinj sees big convective storms in summer afternoons. Check the weather across the entire upper drainage.
Vehicle access	2WD, paved to Stara Fužina then unpaved forest road to the Voje trailhead. Passenger vehicle suitable.
Crowd	The walking Mostnica Korita gorge near Stara Fužina is heavy with day-hikers; the canyoneering descent upstream sees guided commercial parties in summer and is otherwise quiet.
Coordinates	46.2905, 13.8867

Sources

ropewiki: https://ropewiki.com/Mostnica