Karst Spring · Limestone · Cantabria (Trasmiera / Entrambasaguas), ES

Río Aguanaz

Río Aguanaz — M-fuente-del-frances-hoznayo-abrio-2021-a
Poor · Brown Trout
Pheasant Tail Nymph · 14-18
Closed season
Out of season. Try elsewhere.
Closed — confidence not applicable today.
What moved it
  • Level0.10 mLast reading 6h ago
  • Water temp14.7°C
  • ClarityClear
Today's fly
Pheasant Tail Nymph
Pheasant Tail Nymph14-18
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
0.10 m
lowspate
Water temp14.7°C
ClarityClear
Weather16°C
WindS 6 km/h
Pressure1023 hPa
Rain · recent0.0 mm
Rain · ahead0.2 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
Ideal
15°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.
Likely species
Gammarids
Hatch timeline · todayQuiet day

Hatch predictions

Supporters see the full hour-by-hour hatch timeline.

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Sub-surface · on the nymphunder the surface

Hatch predictions

Supporters see the full sub-surface read.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 2 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 · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
1
Freshwater ShrimpHatch
2
3
3
3
3
3
3
3
3
3
3
2
Mayfly (Green Drake)Hatch
2
2
Brown SedgeHatch
2
3
3
3
2
Small SpurwingHatch
2
3
3
3
2

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

Ranked for today
Fly box · Brown Trout
Permits & access
Permit required — see local rules.
  • Cantabrian licencia de pesca required.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Miera
5.0 km
0
Brown trout · Sea trout
Río Campiazo
9.0 km
0
Brown trout · Sea trout
Pisueña
16 km
0
Brown trout · Sea trout
Asón
23 km
0
Brown trout · Sea trout
Gándara
23 km
0
Brown trout
Gallery · 2
  1. Río Aguanaz — M-fuente-del-frances-hoznayo-abrio-2021-a
    M-fuente-del-frances-hoznayo-abrio-2021-a
  2. Terrain map of the venue
    Terrain map
The full read · show the working · for Brown Trout · confidence 50%
How the 0 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow15 × 22%3.3
Clarity95 × 18%17.1
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity23 × 12%2.8
Limiting factor: River is stable — Brown Trout prefers medium flow= 62
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
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
  • Trout dritter Sunday im March → 31 July
Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts