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

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.

Today · Closed season
Pheasant Tail Nymph
Forecast · Today
Closed season
Out of season. Try elsewhere.
45% projected
Today's fly
Pheasant Tail Nymph
Pheasant Tail Nymph
Conditions on the water · Today
Proxy gauge
Level
Rising
Proxy
via Río Lozoya (cotos & tramos)
Water temp4.6°C
ClarityUnfishable
Weather9°C
WindN 15 km/h
Pressure1014 hPa
Rain · recent19.9 mm
Rain · ahead5.9 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
Cool — slow
5°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.
Hatch timeline · todayQuiet day

Low insect activity predicted today

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 3 guilds as a supporter.

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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 · November highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
1
Late March BrownHatch
2
3
2
Large Brook DunHatch
2
3
2
Large StoneflyHatch
2
3
2
Olive UprightHatch
2
3
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
Other water nearby · 5
Molino de la Horcajada (Lozoya coto)
17 km
0
Brown trout
Río Cega
24 km
0
Brown trout
Río Riaza
28 km
0
Brown trout
Embalses de Riosequillo & Puentes Viejas
8.0 km
Brown trout
Embalse de El Atazar
16 km
Black bass · Pike · Carp
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

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 55%
How the 0 is built — score × weight = contribution
Temperature17 × 28%4.8
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity29 × 12%3.5
Limiting factor: Water temperature (4.5°C) is outside Brown Trout's preferred range (10–16°C)= 54
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
Warmer water — toward the 10–16 °C ideal band — would lift the temperature score.
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 2nd Sunday of March → 3rd Sunday of July
Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts
At a glance

Río Madarquillos (TPE II) is a spate river in Comunidad de Madrid / Sierra Norte (Sierra de Guadarrama), Spain. Its recorded elevation is about 975 m above sea level and the catchment geology is granite. The river is described as roughly 12 km long. The species listed for this water is brown trout. The trout season is recorded as running from 2nd Sunday of March to 3rd Sunday of July. Best window recorded for anglers: May–June best within the TPE window, with smaller post-spate openings often more important than broad seasonal claims. Core methods listed: dry fly; small nymph. Its Water Framework Directive ecological status is recorded as good. Nearby waters in our listings include Embalses de Riosequillo & Puentes Viejas at 8.0 km, Embalse de El Atazar at 16 km and Molino de la Horcajada (Lozoya coto) at 17 km.