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.

Poor · Grayling
Pink Grayling Bug · Hook 16
Closed season
Out of season. Try elsewhere.
Closed — confidence not applicable today.
What moved it
  • Level0.46 mLast reading 2h ago
  • Water temp9.6°C
  • ClarityClear
Today's fly
Pink Grayling Bug
Pink Grayling BugHook 16
in season · all-rounder
Conditions on the water
Live gauge
Level
Steady
0.46 m
Last reading 2h ago
Water temp9.6°C
ClarityClear
Weather17°C
WindS 7 km/h
Pressure1011 hPa
Rain · recent2.2 mm
Rain · ahead0.9 mm

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

Water temperature for Grayling
Ideal
10°C est.ideal 4–14°C
0°14°28°
How to fish it · for Grayling
When
Autumn through late autumn — September through November prime. The Ariège is one of the better grayling waters in the French Pyrenees.
Where
Faster gravel runs and the heads of riffles in the middle and lower river. Deeper glide tails as autumn cold pushes fish deeper.
Method
Euro-nymphing through the deeper pockets is the daily default. Switch to dries on autumn afternoons.
Kit
10 ft #3 nymphing rod for the deep pockets; 9 ft #4 for dries. 4 to 5 lb fluoro tippet, 12 ft leader.
Likely species
Stoneflies
Gammarids
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 6 active hatches hour by hour as a supporter.

Start free trial

14-day free trial. Cancel anytime.

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 3 guilds as a supporter.

Start free trial

14-day free trial. Cancel anytime.

Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Supporters see what else is on the menu.

Start free trial

14-day free trial. Cancel anytime.

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
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
Grayling fly box

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

Small Perdigón
Small Perdigón
Hook 14–18 · Fly
in season
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
< 1 km
Brown trout · Grayling
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 · 3
  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. Ariege river at Tarascon
  3. Terrain map of the venue
    Terrain map
About this water

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 Grayling · confidence 90%
How the 0 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time100 × 13%13.0
Pressure80 × 7%5.6
Insect activity57 × 12%6.8
Conditions total= 86
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
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
At a glance

Ariège is a freestone river in Ariège / Pyrenees, France. It sits at about 601 m above sea level. The river is described as roughly 170 km long. Species listed for this water: brown trout and grayling. The trout season is recorded as running from 2nd Saturday of March to 3rd Sunday of September. The grayling season is recorded as running from 3rd Saturday of May to 3rd Sunday of September. Best window recorded for anglers: March–September. Core methods listed: Euro nymphing; dry fly. Level and flow data for this water is linked from 2 gauges. Its Water Framework Directive ecological status is recorded as good. Access is recorded as day tickets through the local AAPPMA (angling association). Nearby waters in our listings include Ariège at < 1 km, Pisciculture des Chutes de l'Aston at 7.0 km and Pisciculture de la Fajolle at 16 km.