Freestone · Mixed · La Seu d'Urgell to Lleida, Catalonia

Río Segre

Segre venue image
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Major Catalan Pyrenean river flowing from the Cerdanya plateau (Puigcerdà) through La Seu d'Urgell toward Lleida.

Marginal · Brown Trout
Klinkhammer · 14-18
Marginallive now
Slow going — pick your moments
Low and clear — careful approach country. Cover and shadow are doing the work today.
90% confidence
What moved it
  • Level0.30 mLast reading 20h ago
  • Water temp18.0°C
  • ClarityClear
Today’s fly
Klinkhammer
Klinkhammer14-18
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
0.30 m
Last reading 20h ago
Water temp18.0°C
ClarityClear
Weather22°C
WindNW 3 km/h
Pressure1024 hPa
Rain · recent0.0 mm
Rain · ahead0.0 mm

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

Water temperature for brown trout
Warm — slow
18°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 18°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots. Otherwise fair — water clarity is in the right range.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 8 active hatches hour by hour 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
J
F
M
A
M
J
J
A
S
O
N
D
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
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.
  • Catalan fishing licence (llicència de pesca) required
  • Upper Segre carries multiple ZPCs (Zones de Pesca Controlada) — La Seu d'Urgell, Bellver, Martinet, Oliana area — each with its own permit allocation, season class (alta muntanya vs baixa muntanya), and method rules (amb mort vs sense mort)
  • Confirm the exact tramo and current Generalitat Resolució de vedes before planning.
What's coming
Plan ahead
5-day outlook
Cooler water nearby · 3
Water here around 18°C — probably warm enough to stress brown trout. These are likely cooler.
Segre (Cerdagne)
30 km
~11°C
Brown trout · Grayling
Noguera de Cardós
23 km
~14°C
Brown trout
Upper Segre
5.0 km
~15°C
Brown trout
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

Major Catalan Pyrenean river flowing from the Cerdanya plateau (Puigcerdà) through La Seu d'Urgell toward Lleida. The upper river above Oliana reservoir is the trout fishery — clear freestone water in alpine/upper-Pyrenean character, holding wild Mediterranean-lineage browns across multiple ZPCs. La Seu d'Urgell is the natural access hub. Below the Oliana reservoir, the river enters a regulated, slower, warmer reach better known as a cyprinid and predator fishery — those lower beats are not the focus of this pack.

  • Mixed
The full read · show the working · for brown trout · confidence 90%
How the 40 is built — score × weight = contribution
Temperature56 × 28%15.7
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity59 × 12%7.1
Conditions total= 72
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.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Troutdepends on Catalan ZPC class → depends on Catalan ZPC class
Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts