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

Río Madarquillos (TPE II)

Río Madarquillos (TPE II) terrain map
Terrain map

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
Poorlive now
Not the day for it
Low and clear — careful approach country. A morning for the obvious fish only.
80% confidence
What moved it
  • LevelProxyvia Río Lozoya (cotos & tramos)
  • Water temp21.5°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 temp21.5°C
ClarityClear
Weather29°C
WindS 10 km/h
Pressure1022 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
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 21.5°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots. Otherwise very poor — water clarity is in the right range.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 4 active hatches hour by hour 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.
  • 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.
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 18 is built — score × weight = contribution
Temperature10 × 28%2.8
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time60 × 13%7.8
Pressure80 × 7%5.6
Insect activity39 × 12%4.7
Limiting factor: Water temperature (21.5°C) is outside Brown Trout's preferred range (10–16°C)= 56
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