Gammarids
- Ecology: Good
- Chemical: Unknown
WFD classification · FRFRR263_1
Rules at a glance
- Day tickets
- Fly only
Water temperature for Brown Trout
Ideal14°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.
Likely species
Hatch timeline · todayQuiet day
Hatch predictions
Today's headline hatch shown — see all 6 active hatches hour by hour as a supporter.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Supporters see the full sub-surface read.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Top prey shown — see all 2 as a supporter.
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 · October 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
Fly box · Brown Trout
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
Other water nearby · 5
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 0 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time55 × 13%7.2
Pressure80 × 7%5.6
Insect activity64 × 12%7.7
Conditions total= 83
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
- Sea trout 1 March → 31 July
- Trout 2e Saturday de March → 3e Sunday de 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
Ideal14°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.
Likely species
Hatch timeline · todayQuiet day
Hatch predictions
Today's headline hatch shown — see all 6 active hatches hour by hour as a supporter.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Supporters see the full sub-surface read.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Top prey shown — see all 2 as a supporter.
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 · October 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
Fly box · Brown Trout
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
Other water nearby · 5
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 0 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time55 × 13%7.2
Pressure80 × 7%5.6
Insect activity64 × 12%7.7
Conditions total= 83
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
- Sea trout 1 March → 31 July
- Trout 2e Saturday de March → 3e Sunday de 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