Freestone · Mixed · Aragón, ES

Isábena

Stone arch bridge over the Isábena river with rocky riverbed, Huesca, Aragón

An eastern Aragonese tributary joining the Ésera system near Beranuy.

Good · Brown Trout
Grasshopper Pattern · 10-14
Goodlive now
A proper day on the water
Low and clear — careful approach country. Stay small, stay accurate.
90% confidence
What moved it
  • Level0.17 mLast reading 16h ago
  • Water temp17.4°C
  • ClarityClear
Today's fly
Grasshopper Pattern
Grasshopper Pattern10-14
Proven pattern for this period
Conditions on the water
Live gauge
Level
Steady
0.17 m
Last reading 16h ago
Water temp17.4°C
ClarityClear
Weather21°C
WindS 12 km/h
Pressure1018 hPa
Rain · recent0.0 mm
Rain · ahead11.6 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 water temperature could be better.
Likely species
Caddisflies
Gammarids
Hatch timeline · todayPeak at 11am

Hatch predictions

Today's headline hatch shown — see all 12 active hatches hour by hour as a supporter.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 3 as a supporter.

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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 · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
2
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
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
Ésera
21 km
Brown trout
Noguera Ribagorzana
22 km
83
Brown trout
Noguera de Tor
32 km
Brown trout
Cinca
39 km
Brown trout
Río Flamisell
41 km
Brown trout
Gallery · 2
  1. Stone arch bridge over the Isábena river with rocky riverbed, Huesca, Aragón
    The Isábena river near La Puebla de Roda, Aragón
  2. Terrain map of the venue
    Terrain map
About this water

An eastern Aragonese tributary joining the Ésera system near Beranuy. Mixed geology with limestone influence in lower reaches transitions to granite and slate in upper sections. Good wild-trout populations in the upper valley respond to technical presentation.

  • Mixed
The full read · show the working · for Brown Trout · confidence 90%
How the 75 is built — score × weight = contribution
Temperature56 × 28%15.7
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time80 × 13%10.4
Pressure80 × 7%5.6
Insect activity73 × 12%8.8
Conditions total= 75
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.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout third Saturday of March → 15 October
Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts