Freestone · Limestone · Pyrénées-Atlantiques / Béarn

Gave d'Oloron

Photo of Gave d'Oloron
Contributor photo

Gave d'Oloron — image via Wikipedia (Gave d'Oloron)

No machine-readable author provided. Sebb assumed (based on copyright claims). <CC BY-SA 3.0>, via Wikimedia Commons

The Gave d'Oloron carries the principal wealth of Atlantic salmon to France — the water that has shaped French salmon culture for generations.

Poor · Brown Trout
CDC Emerger · 16-18
Poorlive now
Not the day for it
River temperature is the limiting factor today, not the flow. This is not the day to push it. Check the thermal advice above before you head out.
90% confidence
What moved it
  • LevelDry recentlyNo gauge reading
  • Water temp22.3°C
  • ClarityClear
Today’s fly
CDC Emerger
CDC Emerger16-18
Dead-drift
Conditions on the water
Estimate
Level
Dry recently
No gauge reading
Water temp22.3°C
ClarityClear
Weather24°C
WindW 12 km/h
Pressure1016 hPa
Rain · recent0.0 mm
Rain · ahead5.5 mm

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

Water temperature for brown trout
Warm — slow
22°C est.ideal 1016°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 the seams behind boulders through the Basque piedmont. The Gave d'Oloron runs powerful Pyrenean freestone water.
Method
Upstream dry to risers; dry-dropper through the riffles. Long leader, fine tippet — Basque water reads clear and fast.
Kit
9 ft #4 — French freestone default. Floating line, 12 ft leader to 4 to 5 lb fluoro. Studded boots.
Why this works
⛔ Water at 22.3°C. This is the line where catch-and-release kills brown trout. Do not fish for them today.
Hatch timeline · todayQuiet day

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Sub-surface · on the nymphunder the surface

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Beyond the hatch · worth watchingambient prey

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Evidence
Survey-backed · regionalModerate confidence

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

Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Salmon runRun
1
2
2
2
1
Sea trout runRun
1
2
2
2
1
Trout seasonSeason
1
2
2
2
2
2
1
Alpine RhithrogenaHatch
2
3
3
2
Sculpin / Baitfish (Rivers)Hatch
2
3
3
3
3
3
3
3
2
March BrownHatch
2
3
2
Large StoneflyHatch
2
3
2

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.
  • Departmental arrêté governs season
  • AAPPMA permits required
  • Catch limits vary — check Gave d'Oloron federation.
What's coming
Plan ahead
5-day outlook
Cooler water nearby · 1
Probably above the brown trout safety line — these are likely cooler, but carry a thermometer.
Gallery · 2
  1. Photo of Gave d'Oloron
    Gave d'Oloron — image via Wikipedia (Gave d'Oloron)
  2. Terrain map of the venue
    Terrain map
About this water

The Gave d'Oloron carries the principal wealth of Atlantic salmon to France — the water that has shaped French salmon culture for generations. It flows from the Pyrenean limestone with the composure of a river that knows its station, clearing quickly after rain and offering fish-holding pools that reward attention and proper presentation. Spring salmon arrive March through May; the best fishing comes on the rising water after Pyrenean rainfall brings fresh flow urgently upstream, and again as the water clears and the fly—at first a tube of an inch or so, later a small double—can be shown to fish that have settled into their lies. The limestone geology ensures colour clears swiftly, a courtesy to those who know how to read it. Brown trout inhabit the headwaters and tributary basins with elegant indifference; they feed best where the gradient steepens and the water speaks quickly over gravel. This is a river for those who understand that salmon fishing in France is not a theatrical pursuit but a contemplative one.

  • Limestone
Water quality (WFD)
  • EcologyGood
  • ChemicalUnknown

WFD classification · FRFRR263_1

The full read · show the working · for brown trout · confidence 90%
How the 10 is built — score × weight = contribution
Temperature5 × 28%1.4
Flow60 × 22%13.2
Clarity95 × 18%17.1
Feeding Time50 × 13%6.5
Pressure80 × 7%5.6
Insect activity59 × 12%7.1
Limiting factor: Water temperature (22.3°C) is outside Brown Trout's preferred range (10–16°C)= 51
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
Seasons & zones
  • Salmon1 March → 31 July
  • Sea trout1 March → 31 July
  • Trout2nd Saturday of March → 3rd Sunday of September

Salmon: Banned (2026) — Adour-Gaves basin renewed salmon ban for 2026.

Sea trout: Seasonal open (2026) — Gave d'Oloron — the principal Basque salmon and sea trout river of the Pyrenean piedmont. Sea trout (truite de mer) are present and legally targeted alongside Atlantic salmon. The river is confirmed as an active sea trout fishery; replace the earlier 'verify_locally' provisional status. Season: official Pyrenean Atlantique dates with C&R extensions in some zones.

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