Spate · Granite · Comunidad de Madrid / Sierra Norte (Sierra de Guadarrama)

Río Madarquillos (TPE II)

Río Madarquillos (TPE II) — Horcajo, molino (1988) 01
Contributor photo

Horcajo, molino (1988) 01

LBM1948 (https://commons.wikimedia.org/wiki/User:LBM1948) - CC BY-SA

The Madarquillos runs as a small, cold tributary through the Sierra Norte from Horcajo and Madarcos toward the Puentes Viejas basin, earning designation as TPE II (Tramo de Pesca Experimental) in Madrid's conservation framework.

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 Lozoya (cotos & tramos)
  • Water temp19.2°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 Lozoya (cotos & tramos)
Water temp19.2°C
ClarityClear
Weather20°C
WindSE 6 km/h
Pressure1018 hPa
Rain · recent0.0 mm
Rain · ahead0.0 mm

No gauge on this water — conditions are inferred from Río Lozoya (cotos & tramos). 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
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
⚠️ Water at 19.2°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots. Otherwise poor — water clarity is in the right range.
Hatch timeline · todayPeak at 6pm

Hatch predictions

Today's headline hatch shown — see all 2 active hatches hour by hour with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

See the full sub-surface read 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
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
March BrownHatch
2
3
2
GrannomHatch
2
2
Large StoneflyHatch
2
3
2
Yellow SallyHatch
2
3
2

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.
  • Se requiere licencia de pesca de la Comunidad de Madrid
  • El TPE II tiene sus propios días de acceso y un sistema obligatorio de declaración de capturas, así que consulta las condiciones exactas del TPE en lugar de aplicar la lógica del coto principal del Lozoya.
What's coming
Plan ahead
5-day outlook
Water here around 19°C. Nothing cooler within range — carry a thermometer.
Gallery · 2
  1. Río Madarquillos (TPE II) — Horcajo, molino (1988) 01
    Horcajo, molino (1988) 01
  2. Terrain map of the venue
    Terrain map
About this water

The Madarquillos runs as a small, cold tributary through the Sierra Norte from Horcajo and Madarcos toward the Puentes Viejas basin, earning designation as TPE II (Tramo de Pesca Experimental) in Madrid's conservation framework. Fishing is catch-and-release only, limited to Tuesday, Wednesday, and Saturday with mandatory catch reporting—a framework that trades access frequency for scientific accountability. Permits are managed locally through PESCA Sierra Norte. The stream itself is intimate: tight pocket water and short pools demand small dries and delicate nymphing in classic granitic freestone habitat. Wild browns respond to stealth and precision; false casts and heavy wading carry consequences in confines this tight.

  • Granite
Water quality (WFD)
  • Ecology: Good
  • Chemical: Unknown

WFD classification · ES030MSPF0452010

The full read · show the working · for brown trout · confidence 80%
How the 33 is built — score × weight = contribution
Temperature36 × 28%10.1
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity51 × 12%6.1
Conditions total= 62
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Río Lozoya (cotos & tramos)proxy
Prey activitymodelled from regional profilemodelled
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.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout2nd Sunday of March → 3rd Sunday of July
Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts