Freestone · Granite · Catalonia / Occitanie (Val d'Aran), ES

Garona / Garonne (headwaters)

Garona / Garonne (headwaters) — File:ES5130034-Rio Garona-Arties 2.jpg

The Garona is the Garonne's headwaters — a river rising in high granite peaks and flowing west through the UNESCO Biosphere Reserve of the Val d'Aran.

Today · Not the day for it
BWO Emerger
Forecast · Today
Not the day for it
Not much stacked in your favour today. Worth an hour if you are nearby, not worth the special trip.
45% projected
Today's fly
BWO Emerger
BWO Emerger
Conditions on the water · Today
Proxy gauge
Level
Rising
Proxy
via Noguera Pallaresa
Water temp13.3°C
ClarityUnfishable
Weather14°C
WindN 10 km/h
Pressure1022 hPa
Rain · recent0.4 mm
Rain · ahead4.2 mm

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

Water temperature for Brown Trout
Ideal
13°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Through the Aran valley trout season. Spring olives once snowmelt drops; sedges through summer; small dark flies into autumn close.
Where
Pool tails and the seams behind boulders through the Aran valley. Spanish Garona / Garonne headwaters — clear cold Pyrenean water.
Method
Upstream dry to risers; dry-dropper through the riffles. Aran valley water reads clear — long leader, fine tippet, careful approach.
Kit
9 ft #4 — French freestone default. Floating line, 12 ft leader to 4 to 5 lb fluoro. Studded boots.
Why this works
Poor — water temperature is working for you, but water clarity is the limiting factor today.
Likely species
Stoneflies
Caddisflies
Hatch timeline · todayPeak at 4pm

12pm(now) — Reed Smut

Stage: On emergersApproach: Emerger or dryActivity: 31%
Also:Cinnamon Sedge26%Autumn Olive26%
Peak emergence windowWeather boost8 food groups active

Peak activity at 4pm — Blue Winged Olive (Blue Winged Olive, Weather boost)

Sub-surface · on the nymphunder the surface

Hatch predictions

Supporters see the full sub-surface read.

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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 · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Large Dark OliveHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
Autumn OliveHatch
1
2
1
Brown SedgeHatch
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
Permits & access
Permit required — see local rules.
  • Border-water and named-section rules matter here
  • Check the exact Aragón or Catalonia licence requirement, plus any coto or ZPC permit and special seasonal rules for the precise stretch you plan to fish.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Noguera de Tor
21 km
0
Brown trout
Ésera
32 km
Brown trout
Río Flamisell
35 km
Brown trout
Isábena
45 km
Brown trout
Cinca
47 km
Brown trout
Gallery · 2
  1. Garona / Garonne (headwaters) — File:ES5130034-Rio Garona-Arties 2.jpg
    File:ES5130034-Rio Garona-Arties 2.jpg
  2. Terrain map of the venue
    Terrain map
About this water

The Garona is the Garonne's headwaters — a river rising in high granite peaks and flowing west through the UNESCO Biosphere Reserve of the Val d'Aran. Alpine meadows and dramatic mountain habitat frame clear, cold freestone water holding strong wild brown trout. Technically Spanish territory but culturally and geographically overlapped with France. Spanish and French licences required for respective sections.

  • Granite
Water quality (WFD)
  • Ecology: High
  • Chemical: Unknown
What this classification means

WFD ecological status Good → High corrected to EEA WISE 2022 (3rd RBMP) classification for waterbody ES091MSPF784 (was a stale earlier-cycle value). Source: EEA WISE SWB_SurfaceWaterBody (discodata.eea.europa.eu), verified 2026-06-18.

WFD classification · ES091MSPF784

The full read · show the working · for Brown Trout · confidence 45%
How the 30 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow55 × 22%12.1
Clarity15 × 18%2.7
Feeding Time80 × 13%10.4
Pressure80 × 7%5.6
Insect activity51 × 12%6.1
Limiting factor: Water is very coloured — too coloured for Brown Trout= 65
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Noguera Pallaresaproxy
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
A drop and clear would lift the flow and clarity scores.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout check named border section or controlled zone → check named border section or controlled zone
Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts