Karst Spring · Limestone · Castilla y León, ES

Río Omecillo

Río Omecillo — Bergüenda01

A cross-border Ebro tributary on the Burgos-Álava boundary, joining the Ebro near Bergüenda.

Poor · Brown Trout
Klinkhammer · 14-18
Closed season
Out of season. Plenty of other water available now.
Closed — confidence not applicable today.
What moved it
  • Level0.48 mLast reading 16h ago
  • Water temp13.1°C
  • ClarityClear
Today's fly
Klinkhammer
Klinkhammer14-18
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
0.48 m
Last reading 16h ago
Water temp13.1°C
ClarityClear
Weather17°C
WindN 10 km/h
Pressure1023 hPa
Rain · recent0.0 mm
Rain · ahead0.0 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
Ideal
13°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 · todayPeak at 2pm

Hatch predictions

Today's headline hatch shown — see all 12 active hatches hour by hour with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 3 guilds with Pro.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 4 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 · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
1
Brown SedgeHatch
2
3
3
3
2
Small SpurwingHatch
2
3
3
3
2
Freshwater ShrimpHatch
2
3
3
3
3
3
3
3
3
3
3
2
Small Dark OliveHatch
2
3
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 (Burgos) licence; check Álava boundary tramos for any cross-border rules near the gauge at Bergüenda.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Río Ebro (Burgos — Las Merindades to Miranda)
24 km
Brown trout
Río Jerea
26 km
Brown trout
Río Trueba
45 km
Brown trout
Río Nela
46 km
Brown trout
Río Carranza
55 km
Brown trout
Gallery · 2
  1. Río Omecillo — Bergüenda01
    Bergüenda01
  2. Terrain map of the venue
    Terrain map
About this water

A cross-border Ebro tributary on the Burgos-Álava boundary, joining the Ebro near Bergüenda. The Omecillo is karst-influenced trout water — limestone clarity, steady flows, characteristic Álava-Burgos pool-and-riffle structure. The gauge sits in Álava but the river is mostly Burgos. Wild brown trout. Best fished from May through July; the middle reaches around Quintana-Martín Galíndez hold the most accessible water.

  • Limestone
The full read · show the working · for Brown Trout · confidence 90%
How the 0 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time60 × 13%7.8
Pressure80 × 7%5.6
Insect activity67 × 12%8.0
Conditions total= 84
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
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