Freestone · Limestone · Gorenjska / Bohinj (Stara Fužina)

Mostnica

Mostnica — Mostnica Gorge

The Mostnica cuts a slot gorge above Stara Fužina before it settles into the Bohinjka — most people know it for the gorge walk, which means the fishing gets left alone by the tourists photographing the potholes.

Prime · Barbel
Primelive now
About as good as it gets
Low and clear — careful approach country. Take your time — read the water before you cast.
65% confidence
What moved it
  • LevelDry recentlyNo gauge reading
  • Water temp18.8°C
  • ClarityClear
Conditions on the water
Estimate
Level
Dry recently
No gauge reading
Water temp18.8°C
ClarityClear
Weather21°C
WindW 2 km/h
Pressure1017 hPa
Rain · recent1.2 mm
Rain · ahead0.2 mm

No gauge on this water — readings are regional estimates from weather, not a live gauge.

Water temperature for Barbel
Ideal
19°C est.ideal 16–24°C
0°14°28°
How to fish it · for Barbel
When
May–September
Where
The Mostnica cuts a slot gorge above Stara Fužina before it settles into the Bohinjka — most people know it for the gorge walk, which means the fishing gets…
Why this works
Barbel: comfort conditions look perfect. Stable flow — fishable but not the prime trigger.
Hatch timeline · todayPeak at 6pm

Hatch predictions

Today's headline hatch shown — see all 12 active hatches hour by hour with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 3 guilds with Pro.

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 2 with Pro.

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Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
1
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Alpine RhithrogenaHatch
1
2
2
1
Large Dark OliveHatch
1
2
2
1

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Permits & access
Permit required — see local rules.
  • RD Bohinj
  • Fly-only, barbless
  • Gorge reach is a tourist walk, not practically fishable.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Sava Bohinjka
2.0 km
Brown trout · Marble trout · Rainbow trout
Savica
4.0 km
90
Brown trout · Lake trout
Soča
12 km
Brown trout · Marble trout
Koritnica (Bača tributary, Rut)
13 km
Marble trout · Brown trout · Grayling
Tolminka
15 km
Marble trout · Marble brown hybrid trout · Brown trout
Gallery · 2
  1. Mostnica — Mostnica Gorge
    Mostnica Gorge
  2. Terrain map of the venue
    Terrain map
About this water

The Mostnica cuts a slot gorge above Stara Fužina before it settles into the Bohinjka — most people know it for the gorge walk, which means the fishing gets left alone by the tourists photographing the potholes. Small water, marble and brown trout, best fished below the gorge where you can actually get a fly on it without abseiling.

  • River
  • Limestone
The full read · show the working · for Barbel · confidence 65%
Perfect · river comfort — temperature and flow led
Water temperatureWater temp 18.8°C — prime band for barbel.
FlowStable flow — fishable but not the prime trigger.
LightSun on the water — favoured for sight-fishing and warming.
SeasonPrime month for this species.
Water clarityWater clarity clear — read accordingly for barbel.
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 1 March → 30 September
  • Marble trout 1 April → 31 October
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Booking & contacts