Freestone · Granite · Castilla y León

Río Arlanzón

Río Arlanzón — Río Arlanzón a su paso por Burgos
Contributor photo

Río Arlanzón a su paso por Burgos

Taurëendil (https://commons.wikimedia.org/wiki/User:Taur%C3%ABendil) - CC BY-SA

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.

Prime · Brown Trout
Klinkhammer · 14-18
Primelive now
About as good as it gets
Low and clear — careful approach country. Take your time — read the water before you cast.
90% confidence
What moved it
  • Level0.10 mLast reading 22h ago
  • Water temp16.6°C
  • ClarityClear
Today’s fly
Klinkhammer
Klinkhammer14-18
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
0.10 m
Last reading 22h ago
Water temp16.6°C
ClarityClear
Weather17°C
WindE 12 km/h
Pressure1017 hPa
Rain · recent0.0 mm
Rain · ahead0.0 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
Excellent — water clarity is right today, though insect activity could be better.
Hatch timeline · todayPeak at 6pm

Hatch predictions

Today's headline hatch shown — see all 9 active hatches hour by hour with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

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Beyond the hatch · worth watchingambient prey

Hatch predictions

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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
Trout seasonSeason
1
2
2
2
1
Large Dark OliveHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
Autumn OliveHatch
1
2
1
GrannomHatch
1
1

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.
  • Se requiere licencia de Castilla y León
  • Los cotos de la zona de Pineda requieren permisos de tramo
  • La altitud de la Sierra de la Demanda hace que la temporada efectiva empiece más tarde que la apertura del calendario.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Río Arlanza
16 km
Brown trout
Río Revinuesa
41 km
Brown trout
Upper Río Duero
42 km
78
Brown trout
Embalse de la Cuerda del Pozo
43 km
Carp · Barbel
Río Ucero
55 km
Brown trout
Gallery · 2
  1. Río Arlanzón — Río Arlanzón a su paso por Burgos
    Río Arlanzón a su paso por Burgos
  2. Terrain map of the venue
    Terrain map
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
The full read · show the working · for brown trout · confidence 90%
How the 81 is built — score × weight = contribution
Temperature86 × 28%24.1
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity59 × 12%7.1
Conditions total= 81
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
Directions
Apple MapsGoogle Maps
Seasons & zones
  • TroutLast Sunday of March → 31 July
Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts