Mountain Freestone · Granite · Comunidad de Madrid (Sierra de Guadarrama, ES

Upper Río Manzanares (La Pedriza)

La Pedriza venue image

Mountain headwaters of the Manzanares in the La Pedriza sector of the Sierra de Guadarrama.

Marginal · Brown Trout
Pheasant Tail Nymph · 14-18
Marginallive now
Slow going — pick your moments
River temperature is the limiting factor today, not the flow. Fish dawn or dusk if you go at all, and handle everything with extra care.
80% confidence
What moved it
  • LevelProxyvia Río Eresma
  • Water temp18.9°C
  • ClarityClear
Today's fly
Pheasant Tail Nymph
Pheasant Tail Nymph14-18
High-confidence seasonal pick
Conditions on the water
Proxy gauge
Level
Steady
Proxy
via Río Eresma
Water temp18.9°C
ClarityClear
Weather20°C
WindNE 8 km/h
Pressure1019 hPa
Rain · recent0.2 mm
Rain · ahead7.0 mm

No gauge on this water — conditions are inferred from Río Eresma. The trend transfers, the absolute level does not.

Water temperature for Brown Trout
Warm — slow
19°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Through the Madrid trout season. Spring olives April through May; summer evenings; small dark flies into autumn close. La Pedriza altitude means the upper Manzanares fishes later than the lower river.
Where
Upper Manzanares through La Pedriza national park. Pool tails and pocket water through dramatic granite slabs. Small intimate Sierra de Guadarrama water.
Method
Upstream dry to risers; dry-dropper through the riffles. The water reads clear — long leader, fine tippet, careful approach.
Kit
8'6 ft #3 to 9 ft #4 — small mountain stream. Floating line, 9 to 12 ft leader to 4 lb fluoro. Studded boots.
Why this works
Water at 18.9°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots.
Hatch timeline · todayPeak at 6am

Hatch predictions

Today's headline hatch shown — see all 3 active hatches hour by hour with Pro.

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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
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
Large Dark OliveHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
Autumn OliveHatch
1
2
1
GrannomHatch
1
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.
  • Comunidad de Madrid licence required
  • Verify coto and tramo status annually.
What's coming
Plan ahead
5-day outlook
Water here around 19°C. Nothing cooler within range — carry a thermometer.
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

Mountain headwaters of the Manzanares in the La Pedriza sector of the Sierra de Guadarrama. Cold, rocky, broken water with wild brown trout. No pike — this is high-altitude granite trout water entirely above the reservoirs where invasives are established.

  • Granite
The full read · show the working · for Brown Trout · confidence 80%
How the 34 is built — score × weight = contribution
Temperature41 × 28%11.5
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time55 × 13%7.2
Pressure80 × 7%5.6
Insect activity66 × 12%7.9
Conditions total= 67
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Río Eresmaproxy
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.
The dawn and dusk windows score higher than the midday lull.
Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
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