Spate · Limestone · Cantabria, ES

Asón

Asón venue image
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Probably the best-known eastern salmonid basin in Cantabria.

Species

A good day — worth the effort

River high but settled. Water still carrying colour. Heavier flies, settled lies.

75% confidence in this read
Water temperature for sea trout
Ideal
9°C est.ideal 8–15°C
0°14°28°
Why this score · for sea trout
  • Temperature10028% weight
  • Flow7122% weight
  • Clarity8518% weight
  • Feeding Time5513% weight
  • Pressure857% weight
  • Prey Activity4612% weight
Conditions
Level
1.32 m
Water temp
8.6°C
Estimated
Clarity
Clear
Clearing
Air temp
11°C
Wind
SW 8 km/h
Light breeze
Pressure
1018 hPa
Rain · 48h
3.1 mm
Light rain
Rain · ahead
5.6 mm
Light rain · next 48h

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

How to fish it · for sea trout
When
From dusk into the first half of the night.
Where
Deeper pools and slower glides · hold water and current seams.
Method
Fish dark patterns on a sink-tip or lightly sunk line, especially near structure.
Kit
10 ft #6/7 rod, floating line with a sink-tip option, 8–10 lb fluoro tippet for the swing.
Why this works
Good conditions. Temperature is favourable (100), Prey activity is weakest (46).
Through the year
0–3 scale · May 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.

Gallery · 1
  1. Terrain map of the venue
    Terrain map
Permits & access
Permit required — see local rules.
  • Cantabrian fishing licence required
  • Annex-driven basin rules, named no-kill stretches, and coto conditions matter more than generic salmon-river language, so check the exact stretch before travel.
Directions
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About this water

Probably the best-known eastern salmonid basin in Cantabria. Crystal-clear limestone river rising in Picos de Europa karst with exceptional water quality. Heavily managed: cotos, special no-kill trout stretches, protected zones and changing rules by annex. The compact 39 km concentrates excellent fishing with 4-hour spate response. Salmon belong mainly to the river's historical prestige now; wild brown trout in upper sections are the real practical interest for fly anglers, with sea trout adding later-season migratory value. Limestone geology creates characteristic pale turquoise pools ideal for sight-fishing with small nymphs and dries.

  • Limestone
Seasons & zones
  • Troutthird Sunday of March → 31 July
Other water nearby · 5
Booking & contacts