Main western Pyrenean Ebro tributary crossing Aragón into Navarra. Key trout reaches sit around Yesa and the pre-Pyrenean corridor, where bigger-water nymphing and caddis-driven dry-fly windows define the main trout interest.
- Mixed
Rules at a glance
- Free fishing
- Fly only
A side-water session, not the main event
River dropping into shape after a lift. Worth a few hours before it drops away.
75% confidence in this read
Live now
Conditions on the water
Trends shown where the gauge supports them
Level
1.03 m
Water temp
5.8°C
Estimated
Clarity
Coloured
Clearing
Air temp
5°C
Wind
N 9 km/h
Light breeze
Pressure
1018 hPa
Rain · 48h
0.6 mm
No meaningful rain
Rain · ahead
1.1 mm
No meaningful rain · next 48h
Live readings — water temperature is an estimate where the gauge does not record it.
How to fish · for brown trout
The brief
When · where · method · kit
How to fish it · for brown trout
When
Through the Navarrese trout season. Spring olives April through May; sedges through summer; small dark flies into the autumn close.
Where
Pool tails and the seams behind boulders through the upper Aragón valley. Pyrenean piedmont character — clear water, classic Iberian wild brown trout water.
Method
Upstream dry to risers; dry-dropper through the riffles. The Aragón runs clear Pyrenean water — long leader, fine tippet.
Kit
9 ft #4 — French freestone default. Floating line, 12 ft leader to 4 to 5 lb fluoro. Studded boots.
Why this works
Fair conditions. Flow is favourable (95), Prey activity is weakest (20).
Hatches & runs
What's on, when
Twelve months at a glance
Through the year
0–3 scale · May highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
1
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Today's fly · curated pack
Top pattern + the box
2 patterns from this venue's curated pack
Detail · next 12h
Water temperature & rain
The two readings most likely to move the verdict
Water temperature for brown trout
Cool — slow6°C est.ideal 10–16°C
0°14°28°
Evidence
Why today scores what it does
6 factors, signed
- Temperature3328% weight
- Flow9522% weight
- Clarity4018% weight
- Feeding Time5013% weight
- Pressure807% weight
- Prey Activity2012% weight
About this water
Río Aragón, end to end
Field guide · contributor-editedRío Aragón · about
What this water is
Background · character · contributors
About this water
Río Aragón · directions
How to get to the water
Directions
Río Aragón · zones
Where the rules change
Seasons · zones · per-species rules
Seasons & zones
- Trout1 May → 30 June
Río Aragón · permits
Licences, sorteo, the rules
Permits & access
Permit required — see local rules.
- Gobierno de Navarra fishing licence required
- Yesa reservoir regulates flow downstream, and the exact tramo and permit structure should be checked in the current official Navarra calendar before travel.
Río Aragón
Google Places
Main western Pyrenean Ebro tributary crossing Aragón into Navarra.
Species
A side-water session, not the main event
River dropping into shape after a lift. Worth a few hours before it drops away.
75% confidence in this read
Water temperature for brown trout
Cool — slow6°C est.ideal 10–16°C
0°14°28°
Why this score · for brown trout
- Temperature3328% weight
- Flow9522% weight
- Clarity4018% weight
- Feeding Time5013% weight
- Pressure807% weight
- Prey Activity2012% weight
Conditions
Level
1.03 m
Water temp
5.8°C
Estimated
Clarity
Coloured
Clearing
Air temp
5°C
Wind
N 9 km/h
Light breeze
Pressure
1018 hPa
Rain · 48h
0.6 mm
No meaningful rain
Rain · ahead
1.1 mm
No meaningful rain · next 48h
Live readings — water temperature is an estimate where the gauge does not record it.
How to fish it · for brown trout
When
Through the Navarrese trout season. Spring olives April through May; sedges through summer; small dark flies into the autumn close.
Where
Pool tails and the seams behind boulders through the upper Aragón valley. Pyrenean piedmont character — clear water, classic Iberian wild brown trout water.
Method
Upstream dry to risers; dry-dropper through the riffles. The Aragón runs clear Pyrenean water — long leader, fine tippet.
Kit
9 ft #4 — French freestone default. Floating line, 12 ft leader to 4 to 5 lb fluoro. Studded boots.
Why this works
Fair conditions. Flow is favourable (95), Prey activity is weakest (20).
Through the year
0–3 scale · May highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
1
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Gallery · 1
Terrain map
Permits & access
Permit required — see local rules.
- Gobierno de Navarra fishing licence required
- Yesa reservoir regulates flow downstream, and the exact tramo and permit structure should be checked in the current official Navarra calendar before travel.
Directions
About this water
Main western Pyrenean Ebro tributary crossing Aragón into Navarra. Key trout reaches sit around Yesa and the pre-Pyrenean corridor, where bigger-water nymphing and caddis-driven dry-fly windows define the main trout interest.
- Mixed
Seasons & zones
- Trout1 May → 30 June
Other water nearby · 5
Booking & contacts