Freestone · Limestone · Primorska / Rut, SI

Koritnica (Bača tributary, Rut)

Koritnica (Bača tributary) — Koritnica, Bača ravine

4.

Today · About as good as it gets
Pheasant Tail Nymph (sz 18)
Forecast · Today
About as good as it gets
On the feed top to bottom — start on the rises with a dry, drop a nymph if they stay down.
75% projected
Today's fly
Pheasant Tail Nymph (sz 18)
Pheasant Tail Nymph (sz 18)
Conditions on the water · Today
Proxy gauge
Level
Falling
Proxy
via River Bača
Water temp13.7°C
ClaritySlightly coloured
Weather16°C
WindN 7 km/h
Pressure1022 hPa
Rain · recent0.3 mm
Rain · ahead0.0 mm

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

Water temperature for Brown Trout
Ideal
14°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown 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
Excellent — water temperature is working for you, but time of day is the limiting factor today.
Likely species
Mayflies
Caddisflies
Damselflies & dragonflies
Hatch timeline · todayPeak at 1pm

12pm(now) — Reed Smut

Stage: On emergersApproach: Emerger or dryActivity: 81%
Also:Pale Watery77%Cinnamon Sedge52%Heather Fly33%
Peak emergence window11 food groups active

Peak activity at 1pm — Pale Watery (Pale Watery, Degree-days at peak)

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 2 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 · September 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
Brown 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.

SW
Streamer / Woolly BuggerTop
6-10 · Pattern
High-confidence seasonal pick
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
84
Marble trout · Brown trout · Grayling
Tolminka
10 km
Marble trout · Marble brown hybrid trout · Brown trout
Cerknica (Idrijca tributary)
10 km
86
Marble trout · Marble brown hybrid trout · Brown trout
River Bača
11 km
84
Brown trout · Marble trout · Rainbow trout
River Trebuščica
11 km
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

4.7 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 Brown Trout · confidence 75%
How the 80 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity50 × 12%6.0
Conditions total= 80
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