Spate · Limestone · Cantabria, ES

Miera

Miera venue image
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The Miera is Cantabria's premier pure trout water — limestone spring-fed clarity combined with compact, responsive catchment ideal for technical sight-fishing.

Fair · Brown Trout
Klinkhammer · 14-18
Fairlive now
A side-water session, not the main event
River dropping into shape after a lift. Worth a few hours before it drops away.
75% confidence
What moved it
  • Level0.83 mDropping after lift
  • Water temp17.0°C
  • ClarityColouredColouring up
Today’s fly
Klinkhammer
Klinkhammer14-18
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
0.83 m
lowspate
Water temp17.0°C
ClarityColoured
Weather20°C
WindNE 19 km/h
Pressure1025 hPa
Rain · recent3.3 mm
Rain · ahead1.0 mm

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

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.
Why this works
Fair — barometric pressure is working for you, but insect activity is the limiting factor today.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 3 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
Sea trout runRun
1
1
Trout seasonSeason
1
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.
  • 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
Pisueña
11 km
38
Brown trout · Sea trout
Río Aguanaz
5.0 km
Brown trout
Río Campiazo
14 km
Brown trout · Sea trout
Pas
20 km
Brown trout · Sea trout
Gándara
22 km
Brown trout
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

The Miera is Cantabria's premier pure trout water — limestone spring-fed clarity combined with compact, responsive catchment ideal for technical sight-fishing. Rising in karst upstream of Liérganes, it's the fastest-responding major Cantabrian river (3 hours). Spates develop and subside rapidly; experienced anglers time visits for the brief window of ideal water colour. The 41 km concentrates excellent fishing into relatively small area with numerous day-ticket beats. Limestone ensures exceptional clarity supporting prolific, notably larger wild brown populations. Dry fly is dominant — pocket water demands precision; slower pools reward careful stalking of visible fish. Sea trout July onwards add summer dimension. Easy road access and lodge infrastructure make this the most angler-friendly Cantabrian option for trout specialists.

  • Limestone
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 75%
How the 56 is built — score × weight = contribution
Temperature77 × 28%21.6
Flow40 × 22%8.8
Clarity40 × 18%7.2
Feeding Time75 × 13%9.8
Pressure80 × 7%5.6
Insect activity28 × 12%3.4
Conditions total= 56
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Sea troutJuly → August
  • Trout1 April → 31 July
Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts