Spate · Granite · Castilla y León, ES

Río Negro (Zamora)

Río Negro (Zamora) terrain map

A Sanabria tributary of the Tera rising in the Sierra Segundera and joining the parent river near Rionegro del Puente.

Poor · Brown Trout
Pheasant Tail Nymph · 14-18
Closed season
Out of season. Try elsewhere.
Closed — confidence not applicable today.
What moved it
  • Level0.67 mLast reading 4h ago
  • Water temp7.5°C
  • ClarityClear
Today's fly
Pheasant Tail Nymph
Pheasant Tail Nymph14-18
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
0.67 m
Last reading 4h ago
Water temp7.5°C
ClarityClear
Weather12°C
WindNE 14 km/h
Pressure1023 hPa
Rain · recent0.0 mm
Rain · ahead0.1 mm

The nearest gauge doesn't record temperatures, so we've estimated it — defer to the river keeper's advice.

Water temperature for Brown Trout
Cool — slow
8°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.
Likely species
Stoneflies
Hatch timeline · todayPeak at 11am

Hatch predictions

Today's headline hatch shown — see all 3 active hatches hour by hour as a supporter.

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Sub-surface · on the nymphunder the surface

Hatch predictions

Supporters see the full sub-surface read.

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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 · October 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.
  • Castilla y León licence required
  • Parque Natural del Lago de Sanabria — verify protected-area rules in upper Sierra Segundera.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Tera
16 km
0
Brown trout
Órbigo
58 km
0
Brown trout
Río Cabrera
67 km
0
Brown trout
Río Sil
74 km
0
Brown trout
Río Aliste
22 km
Brown trout
About this water

A Sanabria tributary of the Tera rising in the Sierra Segundera and joining the parent river near Rionegro del Puente. Granite freestone water through the wooded Sanabria country, with classic mountain pool-riffle structure. Wild brown trout. Best fished from May through July; the upper Sierra Segundera reaches above Espadañedo hold up later.

  • Granite
The full read · show the working · for Brown Trout · confidence 75%
How the 0 is built — score × weight = contribution
Temperature57 × 28%16.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time45 × 13%5.9
Pressure80 × 7%5.6
Insect activity28 × 12%3.4
Conditions total= 66
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
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 Last Sunday of March → 31 July
Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts