Freestone · Limestone · Castilla y León

Río Duratón

Río Duratón terrain map
Terrain map

The Duratón rises in the Sierra de Ayllón uplands and runs through limestone canyon country south of Sepúlveda before joining the Duero.

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.
75% confidence
What moved it
  • Level0.68 mLast reading 1h ago
  • Water temp16.8°C
  • ClarityClear
Today’s fly
Klinkhammer
Klinkhammer14-18
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
0.68 m
Last reading 1h ago
Water temp16.8°C
ClarityClear
Weather19°C
WindSW 6 km/h
Pressure1018 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
Through the Castilla y León trout season. Spring olives April through May; summer sedges; small dark flies into autumn close.
Where
Pool tails through the Duratón gorge stretches. The river carves through limestone canyons — striking water with a dramatic backdrop.
Method
Upstream dry to risers; dry-dropper through the riffles. The water reads clear — long leader, fine tippet, careful approach.
Kit
9 ft #4 — Castilian default. Floating line, 12 ft leader to 4 lb fluoro. Studded boots — granite cobble runs slick.
Why this works
Good — water clarity is working for you, but time of day is the limiting factor today.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 7 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

Top prey shown — see all 2 with Pro.

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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
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
  • Sepúlveda-area tramos and AREs need separate permits
  • Strong tramo variation means the JCyL pesca visor is essential for choosing the right stretch.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Río Riaza
21 km
Brown trout
Río Cega
25 km
30
Brown trout
Río Madarquillos (TPE II)
33 km
33
Brown trout
Embalses de Riosequillo & Puentes Viejas
38 km
Brown trout
Molino de la Horcajada (Lozoya coto)
41 km
33
Brown trout
About this water

The Duratón rises in the Sierra de Ayllón uplands and runs through limestone canyon country south of Sepúlveda before joining the Duero. The river has real wild-trout reaches in the upper basin and Sepúlveda area, but quality is highly tramo-dependent — some sections are excellent fly water, others run through warm, regulated, lower-quality reaches. Treat it as a 'check the exact tramo' venue rather than a blanket recommendation.

  • Limestone
The full read · show the working · for brown trout · confidence 75%
How the 76 is built — score × weight = contribution
Temperature81 × 28%22.7
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity62 × 12%7.4
Conditions total= 76
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • TroutLast Sunday of March → 31 July
Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts