Freestone · Limestone · Andalucía / Jaén (Sierra de Cazorla–Las Villas), ES

Guadalquivir (upper / Cazorla headwaters)

Clear spring water cascading over moss-covered rock at the source of the Guadalquivir river in the Sierra de Cazorla natural park
Good · Rainbow Trout
Woolly Bugger · 10-12
Goodlive now
A proper day on the water
Low and clear — careful approach country. Stay small, stay accurate.
75% confidence
What moved it
  • Level0.36 mLast reading 6h ago
  • Water temp17.3°C
  • ClarityClear
Today's fly
Woolly Bugger
Woolly Bugger10-12
Proven pattern for this period
Conditions on the water
Live gauge
Level
Steady
0.36 m
Last reading 6h ago
Water temp17.3°C
ClarityClear
Weather19°C
WindE 4 km/h
Pressure1018 hPa
Rain · recent0.0 mm
Rain · ahead0.0 mm

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

Water temperature for Rainbow Trout
Ideal
17°C est.ideal 10–18°C
0°14°28°
How to fish it · for Rainbow 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 temperature is working for you, but time of day is the limiting factor today.
Hatch timeline · todayPeak at 11am

Hatch predictions

Today's headline hatch shown — see all 10 active hatches hour by hour with Pro.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 2 with Pro.

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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 · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
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
Rainbow Trout fly box
Permits & access
Permit required — see local rules.
  • Junta de Andalucía licence plus trout surcharge required
  • Upper Guadalquivir cotos and managed beats can carry their own allocation and method rules, so confirm the current BOJA order and local permit conditions before travel.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Río Borosa
7.0 km
Brown trout
Upper Guadalquivir
9.0 km
Brown trout
Río Castril
26 km
Brown trout
Río Madera (Bajo)
31 km
Brown trout
Río Segura (headwaters)
35 km
Brown trout · Rainbow trout
Gallery · 2
  1. Clear spring water cascading over moss-covered rock at the source of the Guadalquivir river in the Sierra de Cazorla natural park
    The source of the Guadalquivir, Sierra de Cazorla
  2. Terrain map of the venue
    Terrain map
Water quality (WFD)
  • Ecology: Moderate
  • Chemical: Unknown
What this classification means

WFD ecological status Poor → Moderate corrected to EEA WISE 2022 (3rd RBMP) classification for waterbody ES050MSPF011009044 (was a stale earlier-cycle value). Source: EEA WISE SWB_SurfaceWaterBody (discodata.eea.europa.eu), verified 2026-06-18.

WFD classification · ES050MSPF011009044

The full read · show the working · for Rainbow Trout · confidence 75%
How the 78 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time40 × 13%5.2
Pressure75 × 7%5.3
Insect activity53 × 12%6.4
Conditions total= 78
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout durante los periodos hábiles (check current BOJA) → during the designated open period
Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts