Lowland · Mixed · East Jutland, DK

Lilleåen

Lilleå ved Hinnerup

A Gudenå tributary singled out by Riverfisher as the place for really big sea trout in the system.

Today · Slow going — pick your moments
Pheasant Tail Nymph
Forecast · Today
Slow going — pick your moments
Slow going — pick your moments and do not force it.
40% projected
Today's fly
Pheasant Tail Nymph
Pheasant Tail Nymph
Conditions on the water · Today
Proxy gauge
Level
Rising
Proxy
via Karup Å
Water temp4.2°C
ClarityVery coloured
Weather3°C
WindN 15 km/h
Pressure1009 hPa
Rain · recent4.3 mm
Rain · ahead0.0 mm

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

Water temperature for Brown Trout
Cool — slow
4°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
Poor — water clarity is working for you, but water temperature is the limiting factor today.
Likely species
Gammarids
Hatch timeline · todayQuiet day

Low insect activity predicted today

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

Top prey shown — see all 2 as a supporter.

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Evidence
Survey-backed · regionalHigh confidence

Backed by regional invertebrate surveys; no sampling on this exact reach yet.

Through the year
0–3 scale · November highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Sea trout runRun
1
2
2
2
2
2
2
2
1
Trout seasonSeason
1
2
2
2
2
2
2
2
1
Terrestrial BeetlesHatch
2
3
3
2
Blue Winged OliveHatch
1
2
2
2
2
1
Black MidgeHatch
1
2
2
2
2
2
2
2
2
2
2
1
Summer River MidgeHatch
1
2
2
2
1

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

Ranked for today
Brown Trout fly box
SW
Small wet fly (Ke-He style)
10–14 · Small wet fly
Proven pattern for this period
Permits & access
Permit required — see local rules.
  • Fisketegn + local association permit
  • Check current sea-trout protection rules in the Gudenå system carefully — parts of the system upstream of Lilleåen are currently closed to sea-trout fishing.
What's coming
Plan ahead
5-day outlook
Fishing better nearby · 4
Karup Å
54 km
69
Brown trout · Sea trout
Villestrup Å
56 km
68
Brown trout · Sea trout
Simested Å
50 km
40
Brown trout · Sea trout
Gudenå
33 km
34
Brown trout · Salmon · Sea trout
Gallery · 2
  1. Lilleå ved Hinnerup
  2. Terrain map of the venue
    Terrain map
About this water

Not a famous headline river in its own right, but it matters precisely because the Gudenå sea-trout story points here. Small-scale water — intimate, manageable, and with the potential for a genuinely large migratory fish. Access is association-managed. Current protection rules for sea trout in parts of the Gudenå system upstream of Lilleåen mean rules must be checked carefully before fishing.

  • Mixed
The full read · show the working · for Brown Trout · confidence 55%
How the 26 is built — score × weight = contribution
Temperature13 × 28%3.6
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time55 × 13%7.2
Pressure85 × 7%6.0
Insect activity36 × 12%4.3
Limiting factor: Water temperature (4.1°C) is outside Brown Trout's preferred range (10–16°C)= 56
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Karup Åproxy
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
Warmer water — toward the 10–16 °C ideal band — would lift the temperature score.
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Sea trout 1 March → 30 November
  • Trout 1 March → 30 November

Sea trout: Variable seasonal (2026)

Related guides
Euro Nymphingsubsurface methods
Booking & contacts
At a glance

Lilleåen is a lowland river in East Jutland, Denmark. It sits at about 18 m above sea level. Species listed for this water: brown trout and sea trout. The sea trout season is recorded as running from 1 March to 30 November. The trout season is recorded as running from 1 March to 30 November. Best window recorded for anglers: May–October, with the chance of big sea trout making it worth the effort in the right conditions. Core methods listed: Nymph; Small wet fly; Light streamer. Nearby waters in our listings include Gudenå at 33 km, Simested Å at 50 km and Karup Å at 54 km.