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

Río Madarquillos (TPE II)

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

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.

Poor · Brown Trout
Pheasant Tail Nymph · 14-18
Closed season
Out of season. Plenty of other water available now.
Closed — confidence not applicable today.
What moved it
  • LevelProxyvia Río Lozoya (cotos & tramos)
  • Water temp22.3°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 temp22.3°C
ClarityClear
Weather30°C
WindS 11 km/h
Pressure1016 hPa
Rain · recent0.0 mm
Rain · ahead3.8 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
22°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 22.3°C. This is the line where catch-and-release kills brown trout. Do not fish for them today.
Hatch timeline · todayPeak at 6pm

Hatch predictions

Today's headline hatch shown — see all 6 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
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.
  • Comunidad de Madrid fishing licence required
  • TPE II has its own access days and mandatory reporting structure, so check the exact TPE conditions rather than using the main Lozoya coto logic.
What's coming
Plan ahead
5-day outlook
Water here around 22°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 90%
How the 0 is built — score × weight = contribution
Temperature5 × 28%1.4
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time80 × 13%10.4
Pressure80 × 7%5.6
Insect activity63 × 12%7.6
Limiting factor: Water temperature (22.3°C) is outside Brown Trout's preferred range (10–16°C)= 60
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Río Lozoya (cotos & tramos)proxy
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.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 2nd Sunday of March → 3rd Sunday of July
Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts