Spate · Mixed · Cantabria/Bizkaia border (Valle de Carranza), ES

Río Carranza

Río Carranza venue image

A cross-border river running through the Valle de Carranza on the Cantabria-Bizkaia boundary, joining the Asón near Ramales de la Victoria.

Poor · Brown Trout
Klinkhammer · 14-18
Poorlive now
Not the day for it
River temperature is the limiting factor today, not the flow. This is not the day to push it. Check the thermal advice above before you head out.
80% confidence
What moved it
  • Level0.17 mLast reading 11h ago
  • Water temp21.1°C
  • ClarityClear
Today's fly
Klinkhammer
Klinkhammer14-18
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
0.17 m
lowspate
Water temp21.1°C
ClarityClear
Weather21°C
WindNE 12 km/h
Pressure1018 hPa
Rain · recent0.6 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
21°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 21.1°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots.
Sub-surface · on the nymphunder the surface

Hatch predictions

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Beyond the hatch · worth watchingambient prey

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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 · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
1
March BrownHatch
2
3
2
GrannomHatch
2
2
Large StoneflyHatch
2
3
2
Yellow SallyHatch
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.
  • Cross-border water — verify the correct licence for the bank you intend to fish.
What's coming
Plan ahead
5-day outlook
Water here around 21°C. Nothing cooler within range — carry a thermometer.
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

A cross-border river running through the Valle de Carranza on the Cantabria-Bizkaia boundary, joining the Asón near Ramales de la Victoria. The Carranza is granite-and-schist freestone water, with classic pool-riffle structure through the wooded middle reaches around Lanestosa. Wild brown trout only. The gauge sits at Pondra in the Asón system. Best fished from May through June; the river warms quickly in summer.

  • Mixed
The full read · show the working · for Brown Trout · confidence 80%
How the 21 is built — score × weight = contribution
Temperature13 × 28%3.6
Flow15 × 22%3.3
Clarity95 × 18%17.1
Feeding Time65 × 13%8.5
Pressure80 × 7%5.6
Insect activity23 × 12%2.8
Limiting factor: Water temperature (21.1°C) is outside Brown Trout's preferred range (10–16°C)= 41
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.
A drop and clear would lift the flow and clarity scores.
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Troutthird Sunday of March → 31 July
Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts