Freestone · Mixed · Ariège / Pyrenees, FR

Ariège

The Ariège River flowing through the town of Tarascon-sur-Ariège in the French Pyrenees, with a rocky peak rising behind the rooftops.

The Ariège cuts through the heart of the Pyrenees from high mountains through Luzenac and Foix.

Today · Closed season
Coch-y-bonddu
Forecast · Today
Closed season
Out of season. Try elsewhere.
45% projected
Today's fly
Coch-y-bonddu
Coch-y-bonddu
Conditions on the water · Today
Live gauge
Level
Rising
0.91 m
Lifting fast
Water temp17.9°C
ClarityUnfishable
Weather21°C
WindN 9 km/h
Pressure1019 hPa
Rain · recent0.1 mm
Rain · ahead1.7 mm

The nearest gauge doesn't record temperatures, so we've estimated it — defer to the river keeper's advice.

Water temperature for Brown Trout
Warm — slow
18°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Through the open trout season. Spring olives April through May; sedges through summer; small dark flies into late September.
Where
Pool tails and seams behind boulders through the Ariège valley. Classic Pyrenean freestone — clear, fast, intimate.
Method
Upstream dry to risers; dry-dropper through the riffles. Long leader, fine tippet.
Kit
9 ft #4 — French freestone default. Floating line, 12 ft leader to 4 to 5 lb fluoro. Studded boots.
Likely species
Caddisflies
Gammarids
Hatch timeline · todayPeak at 6pm

12pm(now) — Reed Smut

Stage: On emergersApproach: Emerger or dryActivity: 35%
Also:Flying Ants32%Cinnamon Sedge22%
Peak emergence window7 food groups active

Peak activity at 6pm — Evening Sedge (Evening Sedge, Weather boost)

Sub-surface · on the nymphunder the surface

Hatch predictions

Supporters see the full sub-surface read.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 3 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 · September 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
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

French nymph-first water. Fast current, technical presentation, weighted nymphs and emergers, with dry flies when fish rise.

Permits & access
Permit required — see local rules.
  • AAPPMA permits
  • French Pyrenean regulations.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Ariège (Luzenac reach)
< 1 km
0
Brown trout
Pisciculture des Chutes de l'Aston
7.0 km
Rainbow trout · Brown trout
Pisciculture de la Fajolle
16 km
Rainbow trout · Brown trout · Char
Pisciculture de Montferrier
17 km
Rainbow trout · Brown trout · Char
Bouillouses Mountain Lakes
29 km
Brown trout
Gallery · 2
  1. The Ariège River flowing through the town of Tarascon-sur-Ariège in the French Pyrenees, with a rocky peak rising behind the rooftops.
    The Ariège River at Tarascon-sur-Ariège
  2. Terrain map of the venue
    Terrain map
About this water

The Ariège cuts through the heart of the Pyrenees from high mountains through Luzenac and Foix. Mixed granite headwaters and limestone foothills support wild brown trout — 1st-category water with multiple tributaries. Luzenac section has designated no-kill fly-fishing beat (marked 'PARCOURS NO KILL', free permit on application). Higher waters best early season; lower sections hold consistent trout.

Hatches & food

In the Pyrenean gaves and headwater torrents, resident brown trout move from early-season olives and March browns into strong spring and early-summer stonefly activity, then a long spell of evening caddis and small buzzers, with terrestrials most relevant on wooded lower gaves and much less important high above the tree line.

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

WFD classification · FRFR170

The full read · show the working · for Brown Trout · confidence 90%
How the 0 is built — score × weight = contribution
Temperature61 × 28%17.1
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time60 × 13%7.8
Pressure80 × 7%5.6
Insect activity71 × 12%8.5
Conditions total= 74
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 2nd Saturday of March → 3rd Sunday of September
  • Grayling 3rd Saturday of May → 3rd Sunday of September

    France national rule: grayling opens 3rd Saturday of May in all waters. In 1st category (salmonid) rivers, grayling closes with the trout season on the 3rd Sunday of September. Departmental regulations may impose additional restrictions. Always check the relevant département's 2026 arrêté préfectoral.

Related guides
Grayling Playbookgrayling tacticsPyrenees PlaybookFrench riversEuro Nymphingsubsurface methods
Booking & contacts