Spate · Mixed · Gipuzkoa, País Vasco

Oria

Oria — Lasarto el monto cropped
Contributor photo

Lasarto el monto cropped

Asier Sarasua Garmendia, Assar (https://commons.wikimedia.org/wiki/User:Assar) - CC BY-SA

A central Gipuzkoa trout-and-sea-trout river of solid reputation, flowing through pastoral landscapes with mixed geology and a 6-hour spate response.

Poor · Brown Trout
Klinkhammer · 14-18
Poorlive now
Not the day for it
River temperature is the limiting factor today, not the flow. This is not the day to push it. Check the thermal advice above before you head out.
80% confidence
What moved it
  • Level0.37 mLast reading 3h ago
  • Water temp21.5°C
  • ClarityClear
Today’s fly
Klinkhammer
Klinkhammer14-18
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
0.37 m
lowspate
Water temp21.5°C
ClarityClear
Weather23°C
WindW 25 km/h
Pressure1017 hPa
Rain · recent0.0 mm
Rain · ahead0.4 mm

Live readings — water temperature is an estimate where the gauge does not record it.

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.
Sub-surface · on the nymphunder the surface

Hatch predictions

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Beyond the hatch · worth watchingambient prey

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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 Gipuzkoa
  • Comprueba el tramo exacto con nombre propio y cualquier norma de asignación tipo coto antes de viajar; no traslades la lógica fronteriza del Bidasoa al Oria.
What's coming
Plan ahead
5-day outlook
Water here around 22°C. Nothing cooler within range — carry a thermometer.
Gallery · 2
  1. Oria — Lasarto el monto cropped
    Lasarto el monto cropped
  2. Terrain map of the venue
    Terrain map
About this water

A central Gipuzkoa trout-and-sea-trout river of solid reputation, flowing through pastoral landscapes with mixed geology and a 6-hour spate response. The middle sections hold the most productive pools and offer quieter fishing than the better-known Bidasoa or Urumea. In practical terms this is a trout river with some migratory heritage, not a modern salmon-destination row.

  • Mixed
Water quality (WFD)
  • Ecology: Moderate
  • Chemical: Unknown
What this classification means

WFD ecological status Bad → Moderate corrected to EEA WISE 2022 (3rd RBMP) classification for waterbody ES017MSPFES028MAR002662 (was a stale earlier-cycle value). Source: EEA WISE SWB_SurfaceWaterBody (discodata.eea.europa.eu), verified 2026-06-18.

WFD classification · ES017MSPFES028MAR002662

The full read · show the working · for brown trout · confidence 80%
How the 18 is built — score × weight = contribution
Temperature10 × 28%2.8
Flow15 × 22%3.3
Clarity95 × 18%17.1
Feeding Time45 × 13%5.9
Pressure80 × 7%5.6
Insect activity17 × 12%2.0
Limiting factor: Water temperature (21.5°C) is outside Brown Trout's preferred range (10–16°C)= 37
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
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.
A drop and clear would lift the flow and clarity scores.
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Troutthird Sunday of March → 31 July

Sea trout: Variable seasonal (2026)

Salmon: Heritage only (2026) — Heritage salmon river. In practical angling terms, salmon are not a target species — focus on trout and sea trout.

Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts