Karst Spring · Limestone · Castilla y León

Río Abión

A spring-fed Duero tributary rising at La Fuentona near Muriel de la Fuente.

Species

About as good as it gets

River steady at a fishable height. About as fair as it ever gets — go properly.

75% confidence in this read
Water temperature for brown trout
Ideal
11°C est.ideal 10–16°C
0°14°28°
Why this score · for brown trout
  • Temperature10028% weight
  • Flow8022% weight
  • Clarity9518% weight
  • Feeding Time5013% weight
  • Pressure807% weight
  • Insect activity6212% weight
Conditions
Level
0.92 m
Water temp
10.9°C
Estimated
Clarity
Clear
Air temp
15°C
Wind
S 7 km/h
Light breeze
Pressure
1014 hPa
Rain · 48h
0.0 mm
No meaningful rain
Rain · ahead
0.0 mm
No meaningful rain · next 48h

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

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
Excellent — water temperature is right today, though time of day could be better.
Through the year
0–3 scale · June highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
1
Brown SedgeHatch
2
3
2
Freshwater ShrimpHatch
2
3
3
3
3
3
3
3
3
3
3
2
Blue Winged OliveHatch
2
3
3
3
3
2
Mayfly (Green Drake)Hatch
2
2

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

Permits & access
Permit required — see local rules.
  • Castilla y León licence required
  • La Fuentona natural monument — verify access rules at the source pool
  • Calatañazor and Berlanga sections more accessible.
Directions
Apple MapsGoogle Maps
About this water

A spring-fed Duero tributary rising at La Fuentona near Muriel de la Fuente. The Abión is one of central Spain's most distinctive trout rivers — limestone karst spring water, clear and cool through summer when surrounding rivers warm. Wild brown trout. The upper reaches around La Fuentona are protected (natural monument) and require careful interpretation of access rules; the middle reaches between Calatañazor and Berlanga offer the most accessible fishing.

  • Limestone
Seasons & zones
  • TroutLast Sunday of March → 31 July
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