Freestone · Limestone · Primorska / Rut, SI

Koritnica (Bača tributary, Rut)

Koritnica (Bača tributary) — Koritnica, Bača ravine

4.

Good · Marble Trout
Light Sculpin · 4–8
Goodlive now
A proper day on the water
River steady at a fishable height. A proper day for it. Work the seams with an upstream nymph, switch to the dry when they show.
75% confidence
What moved it
  • LevelProxyvia River Bača
  • Water temp10.4°C
  • ClarityClear
Today's fly
Light Sculpin
Light Sculpin4–8
Swing, sub-surface
Conditions on the water
Proxy gauge
Level
Steady
Proxy
via River Bača
Water temp10.4°C
ClarityClear
Weather7°C
WindE 12 km/h
Pressure1026 hPa
Rain · recent0.0 mm
Rain · ahead0.3 mm

No gauge on this water — conditions are inferred from River Bača. The trend transfers, the absolute level does not.

Water temperature for Marble Trout
Ideal
10°C est.ideal 8–13°C
0°14°28°
How to fish it · for Marble Trout
When
Nymphing can work through most of the day.
Where
Cover mixed depths.
Method
Start with tight-line nymphs and adjust if fish rise or drift higher.
Kit
9 ft #4 rod, floating line, 12 ft tapered leader to 4–5 lb fluoro tippet.
Why this works
Good — water temperature is right today, though time of day could be better.
Likely species
Mayflies
Stoneflies
Caddisflies
Gammarids
Molluscs
  • Pond snailsMost likelyLower confidence
    #10–12–14 · Adult
    Dead-drift or twitch a snail pattern near weed beds.
Oligochaetes
  • Aquatic wormsMost likelyLower confidence
    #12–14–16 · Adult
    Dead-drift a worm pattern deep - a year-round staple.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 7 active hatches hour by hour as a supporter.

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Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 4 guilds as a supporter.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Supporters see what else is on the menu.

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Evidence
Records-basedModerate confidence

Based on species-occurrence records, not local invertebrate surveys.

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

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

Ranked for today
Marble Trout fly box

Ultra-clear spring-fed rivers with large educated trout. Sight fishing, technical presentation, fine tippets. Euro-nymphing dominant subsurface method. Exceptional dry-fly windows during hatch periods. Gacka is the flagship water.

Permits & access
Permit required — see local rules.
  • RD Tolmin
  • Fly-only, barbless
  • No rainbow trout present.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Kneža
2.0 km
76
Marble trout · Brown trout · Grayling
Tolminka
10 km
75
Marble trout · Marble brown hybrid trout · Brown trout
Cerknica (Idrijca tributary)
10 km
76
Marble trout · Marble brown hybrid trout · Brown trout
River Bača
11 km
75
Brown trout · Marble trout · Rainbow trout
River Trebuščica
11 km
0
Brown trout · Marble trout
Gallery · 2
  1. Koritnica (Bača tributary) — Koritnica, Bača ravine
    Koritnica, Bača ravine
  2. Terrain map of the venue
    Terrain map
About this water

7 km from Rut, and worth being precise about which Koritnica this is — there is a second, better-known Koritnica at Log pod Mangartom that joins the Soča near Bovec, and the two are not the same river. This one is a Bača tributary, rainbow-free by rule rather than accident, holding marble, brown and grayling in water that never sees the traffic the Soča gets.

  • River
  • Limestone
The full read · show the working · for Marble Trout · confidence 75%
How the 76 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow60 × 22%13.2
Clarity95 × 18%17.1
Feeding Time45 × 13%5.9
Pressure80 × 7%5.6
Insect activity54 × 12%6.5
Conditions total= 76
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via River Bačaproxy
Prey activitymodelled from regional profilemodelled
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 1 March → 30 September
  • Marble trout 1 April → 31 October
Related guides
Grayling Playbookgrayling tacticsAlpine Streamsmountain entomologyMarble TroutSoča system
Booking & contacts
Clubs & associations
  • RD Tolmin
    Permit required
At a glance

Koritnica (Bača tributary, Rut) is a freestone river in Primorska / Rut, Slovenia. Its recorded elevation is about 350 m above sea level and the catchment geology is limestone. The river is described as roughly 5 km long. Our data lists marble trout, brown trout and grayling here. The trout season is recorded as running from 1 March to 30 September. The marble trout season is recorded as running from 1 April to 31 October. Best window recorded for anglers: May–September. Core methods listed: Dry fly; Upstream nymph. Nearby waters in our listings include Kneža at 2.0 km, Tolminka at 10 km and Cerknica (Idrijca tributary) at 10 km.