- Ecology: Good
- Chemical: Unknown
WFD classification · FRFRR263_1
Rules at a glance
- Day tickets
- Fly only
Water temperature for Brown Trout
Warm — slow22°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 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 22.2°C. This is the line where catch-and-release kills brown trout. Do not fish for them today.
Hatch timeline · todayQuiet day
Hatch predictions
Today's headline hatch shown — see all 2 active hatches hour by hour with Pro.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 3 guilds with Pro.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Top prey shown — see all 3 with Pro.
Start free trial14-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 · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
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
Late March BrownHatch
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.
- Un arrêté départemental régit la saison
- Carte de pêche AAPPMA obligatoire
- Les quotas de prise varient — vérifiez auprès de la fédération du Gave d'Oloron.
What's coming
Plan ahead
5-day outlook
Cooler water nearby · 2
Probably above the Brown Trout safety line — these are likely cooler, but carry a thermometer.
Gallery · 2
Gave d'Oloron — image via Wikipedia (Gave d'Oloron) Terrain map
Water quality (WFD)
The full read · show the working · for Brown Trout · confidence 90%
How the 2 is built — score × weight = contribution
Temperature1 × 28%0.3
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time60 × 13%7.8
Pressure80 × 7%5.6
Insect activity64 × 12%7.7
Limiting factor: Water temperature (22.2°C) is outside Brown Trout's preferred range (10–16°C)= 56
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
- Sea trout 1 March → 31 July
- Trout 2nd Saturday of March → 3rd Sunday of September
Salmon: Banned (2026) — Salmon fishing is closed across the Adour and Gaves basin under the 2026 prefectoral order (Nouvelle-Aquitaine), which renewed the 2025 total prohibition.
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.
Related guides
Booking & contacts
Gave d'Oloron
Water temperature for Brown Trout
Warm — slow22°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 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 22.2°C. This is the line where catch-and-release kills brown trout. Do not fish for them today.
Hatch timeline · todayQuiet day
Hatch predictions
Today's headline hatch shown — see all 2 active hatches hour by hour with Pro.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 3 guilds with Pro.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Top prey shown — see all 3 with Pro.
Start free trial14-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 · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
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
Late March BrownHatch
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.
- Un arrêté départemental régit la saison
- Carte de pêche AAPPMA obligatoire
- Les quotas de prise varient — vérifiez auprès de la fédération du Gave d'Oloron.
What's coming
Plan ahead
5-day outlook
Cooler water nearby · 2
Probably above the Brown Trout safety line — these are likely cooler, but carry a thermometer.
Gallery · 2
Gave d'Oloron — image via Wikipedia (Gave d'Oloron) Terrain map
Water quality (WFD)
- Ecology: Good
- Chemical: Unknown
WFD classification · FRFRR263_1
The full read · show the working · for Brown Trout · confidence 90%
How the 2 is built — score × weight = contribution
Temperature1 × 28%0.3
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time60 × 13%7.8
Pressure80 × 7%5.6
Insect activity64 × 12%7.7
Limiting factor: Water temperature (22.2°C) is outside Brown Trout's preferred range (10–16°C)= 56
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
- Sea trout 1 March → 31 July
- Trout 2nd Saturday of March → 3rd Sunday of September
Salmon: Banned (2026) — Salmon fishing is closed across the Adour and Gaves basin under the 2026 prefectoral order (Nouvelle-Aquitaine), which renewed the 2025 total prohibition.
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.
Related guides
Booking & contacts