Freestone · Limestone · Bavaria / Rosenheim

Inn (Bavaria)

Inn (Bavaria) terrain map
Terrain map

Large river flowing from Austria through Rosenheim to Passau, grayling, brown trout, and huchen in the system.

Marginal · Brown Trout
Pheasant Tail Nymph · 14-18
Marginallive now
Slow going — pick your moments
River dropping into shape after a lift. A short window. Take your time.
80% confidence
What moved it
  • LevelHeavy rain recentlyNo gauge reading
  • Water temp18.5°C
  • ClaritySlightly coloured
Today’s fly
Pheasant Tail Nymph
Pheasant Tail Nymph14-18
Upstream
Conditions on the water
Estimate
Level
Heavy rain recently
No gauge reading
Water temp18.5°C
ClaritySlightly coloured
Weather23°C
WindNW 9 km/h
Pressure1018 hPa
Rain · recent26.3 mm
Rain · ahead35.5 mm

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

Water temperature for brown trout
Warm — slow
19°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
⚠️ Water at 18.5°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots. Otherwise poor — river flow is in the right range.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 5 active hatches hour by hour with Pro.

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Evidence
ModelledModerate confidence

Modelled from regional ecology — no survey or occurrence data for this water yet.

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
Grayling seasonSeason
1
2
2
2
2
2
2
1
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
1

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

Ranked for today
Brown Trout fly box
Permits & access
Permit required — see local rules.
  • Large Alpine river (Bavaria/Austria border)
  • Fischereischein + Erlaubnisschein required.
What's coming
Plan ahead
5-day outlook
Water here around 19°C. Nothing cooler within range — carry a thermometer.
About this water

Large river flowing from Austria through Rosenheim to Passau, grayling, brown trout, and huchen in the system. Glacial influence in summer colors the main stem; tributaries often offer better fly water than the main channel. Part of the Danube basin trout-grayling zone.

  • Limestone
Water quality (WFD)
  • Ecology: Good
  • Chemical: Unknown

WFD classification · DERW_DEBY_1_F552

The full read · show the working · for brown trout · confidence 80%
How the 37 is built — score × weight = contribution
Temperature47 × 28%13.2
Flow95 × 22%20.9
Clarity85 × 18%15.3
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity48 × 12%5.8
Conditions total= 70
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout1 March → 30 September
  • Grayling1 May → 31 December
Related guides
Hucho / Danube Salmonspecialist apex-predator guideGrayling Playbookgrayling tacticsEuro Nymphingsubsurface methods
Booking & contacts