Freestone · Limestone · Castilla y León, ES

Río Trueba

Riberas Trueba con Puente

A Las Merindades trout river rising in the Sierra Salvada above Espinosa de los Monteros and falling east into the Nela near Medina de Pomar.

Poor · Brown Trout
Pheasant Tail Nymph · 14-18
Closed season
Out of season. Try elsewhere.
Closed — confidence not applicable today.
What moved it
  • Level0.12 mLast reading 3h ago
  • Water temp7.7°C
  • ClarityClear
Today's fly
Pheasant Tail Nymph
Pheasant Tail Nymph14-18
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
0.12 m
Last reading 3h ago
Water temp7.7°C
ClarityClear
Weather12°C
WindNE 17 km/h
Pressure1025 hPa
Rain · recent0.0 mm
Rain · ahead1.0 mm

The nearest gauge doesn't record temperatures, so we've estimated it — defer to the river keeper's advice.

Water temperature for Brown Trout
Cool — slow
8°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.
Likely species
Stoneflies
Gammarids
Hatch timeline · todayPeak at 11am

Hatch predictions

Today's headline hatch shown — see all 6 active hatches hour by hour as a supporter.

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Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 2 guilds as a supporter.

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Evidence
Survey-backed · regionalHigh confidence

Backed by regional invertebrate surveys; no sampling on this exact reach yet.

Through the year
0–3 scale · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
1
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
2
2
2
2
1
Blue Winged OliveHatch
1
2
2
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
  • Burgos provincial tramo system applies — check JCyL pesca visor before fishing.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Río Nela
8.0 km
0
Brown trout
Gándara
23 km
0
Brown trout
Río Jerea
23 km
0
Brown trout
Río Ebro (Burgos — Las Merindades to Miranda)
26 km
0
Brown trout
Río Carranza
28 km
0
Brown trout
Gallery · 2
  1. Riberas Trueba con Puente
  2. Terrain map of the venue
    Terrain map
About this water

A Las Merindades trout river rising in the Sierra Salvada above Espinosa de los Monteros and falling east into the Nela near Medina de Pomar. The Trueba is one of northern Burgos's most respected wild brown trout rivers — limestone-influenced freestone geology, clear water, classic pool-riffle structure through wooded country. Heavily fished by anglers from Madrid and the Basque country. Best in the middle reaches between Espinosa and Trespaderne from late April through July; the upper Sierra Salvada gorges hold up later.

  • Limestone
The full read · show the working · for Brown Trout · confidence 90%
How the 0 is built — score × weight = contribution
Temperature60 × 28%16.8
Flow60 × 22%13.2
Clarity95 × 18%17.1
Feeding Time55 × 13%7.2
Pressure80 × 7%5.6
Insect activity57 × 12%6.8
Conditions total= 67
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
Warmer water — toward the 10–16 °C ideal band — would lift the temperature score.
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout Last Sunday of March → 31 July
Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts