Freestone · Limestone · Castilla y León, ES

Río Duratón

Hoces del río Duratón - 02

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

Today · Closed season
Pheasant Tail Nymph (sz 18)
Forecast · Today
Closed season
Out of season. Try elsewhere.
45% projected
Today's fly
Pheasant Tail Nymph (sz 18)
Pheasant Tail Nymph (sz 18)
Conditions on the water · Today
Live gauge
Level
Rising
0.78 m
Lifting fast
Water temp13.2°C
ClarityUnfishable
Weather20°C
WindN 26 km/h
Pressure1018 hPa
Rain · recent0.4 mm
Rain · ahead0.2 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
Ideal
13°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.
Likely species
Caddisflies
Gammarids
Hatch timeline · todayPeak at 4pm

12pm(now) — Reed Smut

Stage: On emergersApproach: Emerger or dryActivity: 39%
Also:Pale Watery25%Cinnamon Sedge23%
Peak emergence window9 food groups active

Peak activity at 4pm — Blue Winged Olive (Blue Winged Olive, 12 food groups active)

Sub-surface · on the nymphunder the surface

Hatch predictions

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

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Supporters see what else is on the menu.

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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 · September 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
  • 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
Molino de la Horcajada (Lozoya coto)
41 km
0
Brown trout
Río Riaza
21 km
Brown trout
Río Cega
24 km
Brown trout
Río Madarquillos (TPE II)
33 km
Brown trout
Embalses de Riosequillo & Puentes Viejas
38 km
Brown trout
Gallery · 2
  1. Hoces del río Duratón - 02
  2. Terrain map of the venue
    Terrain map
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 90%
How the 0 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time75 × 13%9.8
Pressure80 × 7%5.6
Insect activity57 × 12%6.8
Conditions total= 85
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout Last Sunday of March → 31 July
Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts