Freestone · Limestone · Aragón / Catalonia

Noguera Ribagorzana

A major river straddling the Aragón–Catalonia border and one of the Pyrenees' most important trout streams.

Embalse de Sopeira Rio Noguera Ribagorzana

Anthiro 57 (https://commons.wikimedia.org/w/index.php?title=User:Anthiro_57&action=edit&redlink=1) - CC BY-SA

Warm — handle with careBrown Trout are stressed by warm water — handle every fish carefully.

Water estimated at about 20°C from air temperature — there is no water-temp gauge here, so treat the figure as a guide. Above 18°C, the risk of killing a released fish climbs. Fish dawn or dusk only — the water can be two or three degrees cooler at first light. Barbless hooks. Land it fast — under thirty seconds. Wet hands. No air shots. If a fish swims off slowly or rolls, stop fishing for the day.

DepthShaded riffles, deep pools, spring inflows, cold tributary mouths. Work them and move on.
TimingDawn and dusk only. Avoid the middle of the day — the water peaks then and the fish are most stressed.

Marginallive now

Slow going — pick your moments

River temperature is the limiting factor today, not the flow. Fish dawn or dusk if you go at all, and handle everything with extra care.

80% confidence

Notify when prime

What moved it

Level0.99 mDropping in the last 6h
Water temp19.9°C
ClarityClear

Today’s fly

Klinkhammer14-18

High-confidence seasonal pick

Live now

Conditions on the water

Live gauge

Trends shown where the gauge supports them

Level

Steady

0.99 m

Dropping in the last 6h

Water temp

19.9°C

coldwarm

Clarity

Clear

Weather

24°C

Light cloud

Wind

NE 5 km/h

calmblown out

Pressure

1018 hPa

lowhigh

Rain · recent

0.0 mm

dryspate risk

Rain · ahead

3.3 mm

dryspate risk

Live readings — water temperature is an estimate where the gauge does not record it.

Water temperature for brown trout

Warm — slow

20°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

⚠️ Water at 19.9°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots. Otherwise poor — water clarity is in the right range.

Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 2 active hatches hour by hour with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

See the full sub-surface read with Pro.

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 2 with Pro.

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Evidence

Records-basedModerate confidence

Based on species-occurrence records, not local invertebrate surveys.

Through the year

0–3 scale · July highlighted

Alpine Rhithrogena

Sculpin / Baitfish (Rivers)

March Brown

Large Stonefly

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.

Las normas de agua fronteriza y de tramo nominal son relevantes aquí
Comprueba el requisito exacto de licencia de Aragón o Cataluña, además de cualquier permiso de coto o ZPC y las normas estacionales especiales para el tramo concreto que planeas pescar.

What's coming

Plan ahead

5-day outlook

Cooler water nearby · 3

Water here around 20°C — probably warm enough to stress brown trout. These are likely cooler.

Gallery · 2

Embalse de Sopeira Rio Noguera Ribagorzana
Terrain map

About this water

A major river straddling the Aragón–Catalonia border and one of the Pyrenees' most important trout streams. Limestone throughout — alpine karst headwaters transition to dramatic canyon sections with crystal-clear freestone and technical pocket water. Strong wild brown trout genetics persist despite WFD 'Poor' ecological status (hydropower abstractions and flow regulation affect the middle reaches). Upper headwaters retain the best habitat. High altitude moderates summer temperatures. The Noguera de Tor enters through the UNESCO Vall de Boí. Access from Sort (Catalonia) or Beranuy (Aragón).

Limestone

The full read · show the working · for brown trout · confidence 80%

How the 28 is built — score × weight = contribution

Temperature26 × 28%7.3

Flow80 × 22%17.6

Clarity95 × 18%17.1

Feeding Time40 × 13%5.2

Pressure80 × 7%5.6

Insect activity62 × 12%7.4

Conditions total= 60

Can you trust it?

Water temperatureair-to-water estimateestimated

Level / flowon-river gaugeobserved

Prey activitymodelled from regional profilemodelled

What would change the calculation

Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.

The dawn and dusk windows score higher than the midday lull.

Directions

Apple Maps Google Maps

Seasons & zones

Troutcheck named border section or controlled zone → check named border section or controlled zone

Related guides

Booking & contacts

Freestone · Limestone · Aragón / Catalonia

Noguera Ribagorzana

Contributor photo

Embalse de Sopeira Rio Noguera Ribagorzana

Anthiro 57 (https://commons.wikimedia.org/w/index.php?title=User:Anthiro_57&action=edit&redlink=1) - CC BY-SA

A major river straddling the Aragón–Catalonia border and one of the Pyrenees' most important trout streams.

Marginal · Brown Trout

Klinkhammer · 14-18

Warm — handle with careBrown Trout are stressed by warm water — handle every fish carefully.

DepthShaded riffles, deep pools, spring inflows, cold tributary mouths. Work them and move on.
TimingDawn and dusk only. Avoid the middle of the day — the water peaks then and the fish are most stressed.

Marginallive now

Slow going — pick your moments

River temperature is the limiting factor today, not the flow. Fish dawn or dusk if you go at all, and handle everything with extra care.

80% confidence

Notify when prime

What moved it

Level0.99 mDropping in the last 6h
Water temp19.9°C
ClarityClear

Today’s fly

Klinkhammer14-18

High-confidence seasonal pick

Conditions on the water

Live gauge

Level

Steady

0.99 m

Dropping in the last 6h

Water temp19.9°C

ClarityClear

Weather24°C

WindNE 5 km/h

Pressure1018 hPa

Rain · recent0.0 mm

Rain · ahead3.3 mm

Live readings — water temperature is an estimate where the gauge does not record it.

Water temperature for brown trout

Warm — slow

20°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

⚠️ Water at 19.9°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots. Otherwise poor — water clarity is in the right range.

Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 2 active hatches hour by hour with Pro.

Start free trial

14-day free trial. Cancel anytime.

Sub-surface · on the nymphunder the surface

Hatch predictions

See the full sub-surface read with Pro.

Start free trial

14-day free trial. Cancel anytime.

Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 2 with Pro.

Start free trial

14-day free trial. Cancel anytime.

Evidence

Records-basedModerate confidence

Based on species-occurrence records, not local invertebrate surveys.

Through the year

0–3 scale · July highlighted

Alpine Rhithrogena

Sculpin / Baitfish (Rivers)

March Brown

Large Stonefly

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.

Las normas de agua fronteriza y de tramo nominal son relevantes aquí
Comprueba el requisito exacto de licencia de Aragón o Cataluña, además de cualquier permiso de coto o ZPC y las normas estacionales especiales para el tramo concreto que planeas pescar.

What's coming

Plan ahead

5-day outlook

Cooler water nearby · 3

Water here around 20°C — probably warm enough to stress brown trout. These are likely cooler.