Stillwater · Limestone · Aragón

Embalse de Arguis (Río Isuela coto deportivo)

Embalse de Arguis (Río Isuela coto deportivo) terrain map

The most practical fly day from Zaragoza, and honest about what it is: a stocked coto on the Isuela reservoir under the limestone shoulders of the Sierra de Guara, an hour up the road from the city.

Fair · Rainbow
Klinkhammer · 14-18
A respectable few hours, if you choose your moments
Water temperature is the limiting factor today, not the wave. Fish dawn or dusk if you go at all, and handle everything with extra care.
45% confidence
limited data
What moved it
  • WindW 20 km/hGentle breeze
Today's fly
Klinkhammer
Klinkhammer14-18
High-confidence seasonal pick
Conditions on the water
Live gauge
Wind
Gentle breeze
W 20 km/h
N
W
from the west
Wave40 cm chop
Water temp
Air temp34°C
CloudClear
Pressure1013 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for Rainbow
When
Conditions are not ideal but fishable at Embalse de Arguis (Río Isuela coto deportivo). The ripple should help fish move and feed more confidently. Very warm conditions — trout have a narrower safe zone of cool, oxygen-rich water. Fish only at first light or last light, use barbless hooks, keep fish in the water during release, and stop if fish struggle to recover.
Where
Start with Klinkhammer (14-18) on a As per local method. Rainbows respond to more active retrieves — try short strips between pauses. If that does not produce, switch depth or speed before changing the pattern entirely.
The plan
Plan A

Start with Klinkhammer (14-18) on a As per local method. Rainbows respond to more active retrieves — try short strips between pauses. If that does not produce, switch depth or speed before changing the pattern entirely.

Plan B

Fish early and late, try deeper during the heat of the day with a fast-sinking line.

Watch for

Evening tends to be the best period in summer — stay late if you can for a sedge or spinner fall.

Either bank or boat

Good ripple suits both bank and boat. Bank: work inflows, dam walls, and points. Boat: broadside drift covering wind lanes.

Beyond the hatch · worth watchingambient prey

Hatch predictions

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Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
Reservoir BuzzerHatch
2
3
3
3
3
3
2
Lake OliveHatch
2
3
3
3
3
3
2
Silverhorns & LonghornsHatch
1
2
2
2
1

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Rainbow fly box
Permits & access
Permit required — see local rules.
  • Aragón recreational licence plus the Arguis coto deportivo permit
  • Current rules include a single rod, bank-fishing only, restrictions near the dam/pasarela and no general boat fishing — confirm the live coto plan before planning a trip.
What's coming
Plan ahead
5-day outlook
Condition match
41%
Cloud25%
Wind65%
Temp25%

Conditions are away from Embalse de Arguis (Río Isuela coto deportivo)'s sweet spot — it usually fishes best in ripple wind with cloud skies.

Other water nearby · 5
About this water

The most practical fly day from Zaragoza, and honest about what it is: a stocked coto on the Isuela reservoir under the limestone shoulders of the Sierra de Guara, an hour up the road from the city. Nobody will mistake it for a wild Pyrenean stream, but a stocked reservoir fished well on a buzzer or a slow nymph is a real day's fishing, and on a spring morning before the heat comes off the rock it can be a good one. Rainbows make up most of the stock; the odd brown turns up. It is the right answer when the mountain rivers are blown out, or simply too far for the hours you have.

  • Reservoir
  • Limestone
Why this score
  • High temperatures may push fish deeper and reduce surface activity.
Directions
Seasons & zones
  • Trout check current Arguis coto deportivo plancheck current Arguis coto deportivo plan

    Managed coto deportivo on the Isuela reservoir near Huesca: a coto permit is required in addition to the Aragón recreational licence. Dates, daily quotas and bank restrictions are set by the current coto plan, not by the river trout season — confirm before publishing booking-facing copy.

Related guides
Booking & contacts