Freestone · Mixed · Castilla y León

Río Arlanza

Río Arlanza — Río Arlanza a su paso por Covarrubias
Contributor photo

Río Arlanza a su paso por Covarrubias

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

The Arlanza rises in the Sierra de la Demanda near Palacios de la Sierra and runs west through the Lara highlands.

Good · Brown Trout
Klinkhammer · 14-18
Goodlive now
A proper day on the water
River steady at a fishable height. A proper day for it. Work the seams with an upstream nymph, switch to the dry when they show.
90% confidence
What moved it
  • Level0.74 mLast reading 23h ago
  • Water temp16.8°C
  • ClarityClear
Today’s fly
Klinkhammer
Klinkhammer14-18
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
0.74 m
Last reading 23h ago
Water temp16.8°C
ClarityClear
Weather17°C
WindSE 10 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
Good — water clarity is right today, though insect activity could be better.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 8 active hatches hour by hour with Pro.

Start free trial

14-day free trial. Cancel anytime.

Sub-surface · on the nymphunder the surface

Hatch predictions

See the full sub-surface read with Pro.

Start free trial

14-day free trial. Cancel anytime.

Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 2 with Pro.

Start free trial

14-day free trial. Cancel anytime.

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
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.

Ranked for today
Brown Trout fly box
Permits & access
Permit required — see local rules.
  • Castilla y León licence required
  • Tramo-specific rules apply — JCyL pesca visor.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Río Arlanzón
16 km
Brown trout
Upper Río Duero
26 km
78
Brown trout
Río Revinuesa
26 km
Brown trout
Embalse de la Cuerda del Pozo
33 km
Carp · Barbel
Río Ucero
41 km
Brown trout
Gallery · 2
  1. Río Arlanza — Río Arlanza a su paso por Covarrubias
    Río Arlanza a su paso por Covarrubias
  2. Terrain map of the venue
    Terrain map
About this water

The Arlanza rises in the Sierra de la Demanda near Palacios de la Sierra and runs west through the Lara highlands. It's a named Burgos trout/cyprinid system with respectable upper-basin trout water, though a more variable identity than its sibling the Arlanzón. A solid regional river in its own right, but not in the same class as the Arlanzón as a destination.

  • Mixed
The full read · show the working · for brown trout · confidence 90%
How the 79 is built — score × weight = contribution
Temperature81 × 28%22.7
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity60 × 12%7.2
Conditions total= 79
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