Spate · Limestone · Cantabria, ES

Miera

Miera — Rio Miera La Cavada
Poor · Brown Trout
Klinkhammer · 14-18
Closed season
Out of season. Plenty of other water available now.
Closed — confidence not applicable today.
What moved it
  • Level0.16 mLast reading 6h ago
  • Water temp17.2°C
  • ClarityClear
Today's fly
Klinkhammer
Klinkhammer14-18
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
0.16 m
lowspate
Water temp17.2°C
ClarityClear
Weather17°C
WindSE 4 km/h
Pressure1019 hPa
Rain · recent0.0 mm
Rain · ahead1.4 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
Warm — slow
17°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.
Hatch timeline · todayQuiet day

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Beyond the hatch · worth watchingambient prey(1)

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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 · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Sea trout runRun
1
1
Trout seasonSeason
1
2
2
1
March BrownHatch
2
3
2
Late March BrownHatch
2
3
2
Large Brook DunHatch
2
3
2
Large StoneflyHatch
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.
  • Cantabrian fishing licence required
  • The Miera is trout-first water, but exact stretch, fishing-day rules, and any named no-kill conditions still need checking by annex.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Río Campiazo
14 km
0
Brown trout · Sea trout
Río Aguanaz
5.0 km
Brown trout
Pisueña
11 km
Brown trout · Sea trout
Pas
20 km
Brown trout · Sea trout
Gándara
22 km
Brown trout
Gallery · 2
  1. Miera — Rio Miera La Cavada
    Rio Miera La Cavada
  2. Terrain map of the venue
    Terrain map
Water quality (WFD)
  • Ecology: Moderate
  • Chemical: Unknown
What this classification means

WFD ecological status Good → Moderate corrected to EEA WISE 2022 (3rd RBMP) classification for waterbody ES018MSPFES086MAR000100 (was a stale earlier-cycle value). Source: EEA WISE SWB_SurfaceWaterBody (discodata.eea.europa.eu), verified 2026-06-18.

WFD classification · ES018MSPFES086MAR000100

The full read · show the working · for Brown Trout · confidence 50%
How the 0 is built — score × weight = contribution
Temperature61 × 28%17.1
Flow15 × 22%3.3
Clarity95 × 18%17.1
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity50 × 12%6.0
Limiting factor: River is stable — Brown Trout prefers medium flow= 54
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
  • Sea trout July → August
  • Trout 1 April → 31 July

Sea trout: Variable seasonal (2026)

Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts