Freestone · Granite · Castilla y León

Río Arlanzón

No photos yet for this water.

The Arlanzón rises in the Sierra de la Demanda above Pineda de la Sierra and runs down through the upper valley before feeding the Burgos plain.

Species

Slow going — pick your moments

Low and clear — careful approach country. Cover and shadow are doing the work today.

75% confidence in this read
Water temperature for brown trout
Cool — slow
5°C est.ideal 10–16°C
0°14°28°
Why this score · for brown trout
  • Temperature2028% weight
  • Flow8022% weight
  • Clarity9518% weight
  • Feeding Time4013% weight
  • Pressure807% weight
  • Prey Activity2212% weight
Conditions
Level
0.32 m
Water temp
4.7°C
Estimated
Clarity
Clear
Air temp
3°C
Wind
E 7 km/h
Light breeze
Pressure
1016 hPa
Rain · 48h
0.8 mm
No meaningful rain
Rain · ahead
2.5 mm
Light 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
Fair conditions. Clarity is favourable (95), Temperature is weakest (20).
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
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
1

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
  • Pineda-area cotos require tramo permits
  • Sierra de la Demanda altitude means the season effectively starts later than the calendar opener.
Directions
Apple MapsGoogle Maps
About this water

The Arlanzón rises in the Sierra de la Demanda above Pineda de la Sierra and runs down through the upper valley before feeding the Burgos plain. The upper basin around Pineda is a well-managed Burgos trout system with established coto structure, fly-only/catch-and-release periods, and reliable mountain-water character. Strong granite headwaters; pair with the SAIH Duero EA508 gauge at Pineda de la Sierra for live conditions.

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