Freestone · Mixed · Western Pyrenees, Navarra

Río Aragón

Río Aragón, provincia de Huesca, España
Today · Closed season
Pheasant Tail Nymph (sz 18)
Forecast · Today
Closed season
Out of season. Try elsewhere.
90% projected
Today's fly
Pheasant Tail Nymph (sz 18)
Pheasant Tail Nymph (sz 18)
Conditions on the water · Today
Live gauge
Level
Steady
0.25 m
Water temp15.5°C
ClarityClear
Weather18°C
WindN 8 km/h
Pressure1028 hPa
Rain · recent0.0 mm
Rain · ahead0.0 mm

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

Water temperature for Brown Trout
Ideal
16°C est.ideal 10–16°C
0°14°28°
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.
Likely species
Gammarids
Hatch timeline · todayPeak at 17h

12h(now) — Cinnamon Sedge

Stage: Taking dunsApproach: Dry flyActivity: 30%
Also:Daddy Long Legs30%Autumn Dun27%
Weather boost8 food groups active

Peak activity at 17h — Pale Evening (Pale Evening, Weather boost)

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 2 guilds as a supporter.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Supporters see what else is on the menu.

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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
Trout seasonSeason
1
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
Fly box · Brown Trout
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.
What's coming
Plan ahead
5-day outlook
Fishing better nearby · 5
Veral
35 km
78
Brown trout
Río Areta
20 km
0
Brown trout
Río Urrobi
33 km
0
Brown trout
Río Irati
28 km
Brown trout
Río Salazar
33 km
Brown trout
Gallery · 2
  1. Río Aragón, provincia de Huesca, España
  2. Terrain map of the venue
    Terrain map
The full read · show the working · for Brown Trout · confidence 75%
How the 0 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time45 × 13%5.9
Pressure80 × 7%5.6
Insect activity50 × 12%6.0
Conditions total= 80
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
Apple MapsGoogle Maps
Seasons & zones
  • Trout 1 May → 30 June

    The Aragón straddles Navarra and Aragón communities. Upper sections (Jaca area) may follow Aragonese regulations. Navarran sections fall under RSS rules — all catch-and-release, daily basin permit required. Below Yesa reservoir the river changes character: regulated tailwater flow. Check tramo-specific status for the exact stretch.

Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts