Freestone · Limestone · Aragón, ES

Aragón Subordán

Aragón Subordán — Huesca (provincia), rápidos 1993 01

The Aragón Subordán flows through the dramatic Hecho valley before joining the main Aragón.

Good · Brown Trout
Perdigón · 14-18
Goodlive now
A proper day on the water
Low and clear — careful approach country. Stay small, stay accurate.
75% confidence
What moved it
  • Level0.09 m
  • Water temp16.8°C
  • ClarityClear
Today's fly
Perdigón
Perdigón14-18
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
0.09 m
Water temp16.8°C
ClarityClear
Weather19°C
WindNE 4 km/h
Pressure1019 hPa
Rain · recent0.1 mm
Rain · ahead2.3 mm

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

Water temperature for Brown Trout
Warm — slow
17°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Nymphing can work through most of the day.
Where
Cover mixed depths.
Method
Start with tight-line nymphs and adjust if fish rise or drift higher.
Kit
9 ft #4 rod, floating line, 12 ft tapered leader to 4–5 lb fluoro tippet.
Why this works
Good — water clarity is right today, though time of day could be better.
Hatch timeline · todayPeak at 6pm

Hatch predictions

Today's headline hatch shown — see all 10 active hatches hour by hour with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 3 guilds with Pro.

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 3 with Pro.

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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 · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
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.
  • Aragón fishing licence required
  • Named cotos, social cotos, and special high-mountain sections can have different dates, permit allocations, and method rules, so check the current Aragón plan for the exact beat.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Veral
7.0 km
37
Brown trout
Pyrenean Ibones (high-mountain lakes)
14 km
Brown trout
Gave d'Estaubé
29 km
83
Brown trout · Grayling
Río Salazar
34 km
Brown trout
Gave d'Aspe
35 km
Brown trout · Grayling
Gallery · 2
  1. Aragón Subordán — Huesca (provincia), rápidos 1993 01
    Huesca (provincia), rápidos 1993 01
  2. Terrain map of the venue
    Terrain map
About this water

The Aragón Subordán flows through the dramatic Hecho valley before joining the main Aragón. Limestone gorge creates clear, alkaline freestone water with strong wild-trout populations. The Oza tributary is a classic high-mountain stream ideal for technical dry-fly work. Good wading required.

  • Limestone
Water quality (WFD)
  • Ecology: Good
  • Chemical: Unknown

WFD classification · ES091MSPF516

The full read · show the working · for Brown Trout · confidence 75%
How the 77 is built — score × weight = contribution
Temperature81 × 28%22.7
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time50 × 13%6.5
Pressure80 × 7%5.6
Insect activity66 × 12%7.9
Conditions total= 77
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 check named Aragón coto or free section → check named Aragón coto or free section
Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts