- Ecology: Good
- Chemical: Unknown
WFD classification · ES018MSPFES244MAR002280
Rules at a glance
- Public water
- Licence required
Water temperature for Brown Trout
Warm — slow22°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Slate water keeps an amber tint that suits dry-fly to within an hour of last light. Through the open trout season — March in zonas libres, May onwards in salmon zones.
Where
Step-pool sequences in the upper reaches; the middle Eo settles into pool-riffle on slate cobble. Watch the slabs — good lies for trout, treacherous wading underfoot.
Method
Dry to risers in the long glides, short-line nymph through the step-pools and pocket water. Slate water reads darker than limestone — a smaller, drabber pattern works better than the bright stuff that fishes on the Sella.
Kit
9 ft #4 upper, 9 ft #5 middle. Floating line, 12 ft leader to 4 lb fluoro. Slate slabs look secure and aren't — wading staff.
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.
Sub-surface · on the nymphunder the surface
Hatch predictions
See the full sub-surface read with Pro.
Start free trial14-day free trial. Cancel anytime.
Evidence
Survey-backed · regionalHigh confidence
Backed by regional invertebrate surveys; no sampling on this exact reach yet.
Through the year
0–3 scale · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Salmon runRun
1
2
2
1
Trout seasonSeason
1
2
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
Beats · 6
Cairo · 1.7 kmSorteo
Sorteo stretch — Puente Traslacorde to Frente cruce de carretera Vilaoruz-Foxas.
Beat detail
Sorteo (lottery) permit required
Upstream: Puente Traslacorde
Downstream: Frente cruce de carretera Vilaoruz-Foxas
Pedrido · 1.5 kmC&R
C&R stretch — Frente cruce de carretera Vilaoruz-Foxas to 50 m aguas arriba de la presa de Saltadoiro.
Beat detail
Sorteo permit, all fish returned
Upstream: Frente cruce de carretera Vilaoruz-Foxas
Downstream: 50 m aguas arriba de la presa de Saltadoiro
Estreitos · 1.5 kmSorteo
Sorteo stretch — Pozo de Estreitos 200 m aguas abajo de la pasarela de Piagomayor to Puente del ferrocarril.
Beat detail
Sorteo (lottery) permit required
Upstream: Pozo de Estreitos 200 m aguas abajo de la pasarela de Piagomayor
Downstream: Puente del ferrocarril
Louredal · 1.0 kmSorteo
Sorteo stretch — Puente del ferrocarril to Pasarela de la Volta.
Beat detail
Sorteo (lottery) permit required
Upstream: Puente del ferrocarril
Downstream: Pasarela de la Volta
Volta · 1.0 kmFree Tue/Wed/Sat
Free Tue/Wed/Sat stretch — Pasarela de la Volta to Cabecera pozo Vixato, 150 m aguas abajo del puente La Negra.
Beat detail
Free on Tue/Wed/Sat, sorteo on other days
Upstream: Pasarela de la Volta
Downstream: Cabecera pozo Vixato, 150 m aguas abajo del puente La Negra
Gonzalvo · 1.3 kmSorteo
Sorteo stretch — Cabecera pozo Vixato to Anguieiro cabecera pozo Florentino.
Beat detail
Sorteo (lottery) permit required
Upstream: Cabecera pozo Vixato
Downstream: Anguieiro cabecera pozo Florentino
Beat map
Illustration · Studio Daisy
Permits & access
Free state water
State rod licence required for trout / salmon as applicable.
- Sorteo (lottery) beat allocation via Federación Asturiana de Pesca
- Licencia de pesca + permiso de coto required
- For 2026, salmon cupo is 1 fish per day and 1 per season, of which only 1 may be killed
- Check river-specific coto rules, vedados, and tackle restrictions before fishing.
What's coming
Plan ahead
5-day outlook
Water here around 22°C. Nothing cooler within range — carry a thermometer.
Gallery · 6
Río Eo from the Vía Verde 
Río Eo at A Pontenova 
Río Eo riverside at A Pontenova 
Río Eo at Baleira 
Salmon ladder at Pé da Viña, Río Eo Terrain map
Water quality (WFD)
The full read · show the working · for Brown Trout · confidence 80%
How the 0 is built — score × weight = contribution
Temperature10 × 28%2.8
Flow15 × 22%3.3
Clarity95 × 18%17.1
Feeding Time60 × 13%7.8
Pressure80 × 7%5.6
Insect activity50 × 12%6.0
Limiting factor: Water temperature (21.5°C) is outside Brown Trout's preferred range (10–16°C)= 43
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
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
Seasons & zones
- Trout Third Sunday of March → 15 August
4 zones — different rules apply
- Coto salmonero
Main Eo salmon beats: Cairo, Estreitos, Louredal, Gonzalvo, La Peña, Reiboa, Louside, Las Barcas, El Carbayón, Pozón, Canabeiras — most shared with Galicia
- Salmon: Third Saturday of April → 15 July · 1 per day, 1 per season (kill limit)
- Sea trout: follows Trout
- Trout: Third Sunday of May → 31 July
- Coto salmonero sin muerte
Pedrido sin muerte beat (shared with Galicia)
- Salmon: Third Saturday of April → 15 July
- Sea trout: follows Trout
- Trout: Third Sunday of May → 31 July
- Coto parcial
Volta coto parcial — middle river
- Salmon: Third Saturday of April → 15 July · 1 per day, 1 per season (kill limit)
- Sea trout: follows Trout
- Trout: Third Sunday of March → 31 July
- Zona libre
Non-coto stretches of the Eo — free-access trout water
- Sea trout: follows Trout
- Trout: Third Sunday of March → 31 July
Sea trout: Variable seasonal (2026) — Eo — the Galicia-Asturias border river. Reo and salmon fishery with regulatory complexity (both regional administrations). Sea trout run from the estuary on rising water. Condition-sensitive; regulated access. Night fishing rules vary by bank (Galician vs Asturian side).
Salmon: Heritage only (2026) — Heritage Asturian salmon river — was classic Atlantic salmon and sea trout water until recent decades, now with negligible salmon runs. Listed as 'historic' to acknowledge identity without promoting salmon fishing. Brown trout and (limited) sea trout remain of interest.
Related guides
Booking & contacts
Clubs & associations
Río Eo
Water temperature for Brown Trout
Warm — slow22°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Slate water keeps an amber tint that suits dry-fly to within an hour of last light. Through the open trout season — March in zonas libres, May onwards in salmon zones.
Where
Step-pool sequences in the upper reaches; the middle Eo settles into pool-riffle on slate cobble. Watch the slabs — good lies for trout, treacherous wading underfoot.
Method
Dry to risers in the long glides, short-line nymph through the step-pools and pocket water. Slate water reads darker than limestone — a smaller, drabber pattern works better than the bright stuff that fishes on the Sella.
Kit
9 ft #4 upper, 9 ft #5 middle. Floating line, 12 ft leader to 4 lb fluoro. Slate slabs look secure and aren't — wading staff.
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.
Sub-surface · on the nymphunder the surface
Hatch predictions
See the full sub-surface read with Pro.
Start free trial14-day free trial. Cancel anytime.
Evidence
Survey-backed · regionalHigh confidence
Backed by regional invertebrate surveys; no sampling on this exact reach yet.
Through the year
0–3 scale · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Salmon runRun
1
2
2
1
Trout seasonSeason
1
2
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
Beats · 6
Cairo · 1.7 kmSorteo
Sorteo stretch — Puente Traslacorde to Frente cruce de carretera Vilaoruz-Foxas.
Beat detail
Sorteo (lottery) permit required
Upstream: Puente Traslacorde
Downstream: Frente cruce de carretera Vilaoruz-Foxas
Pedrido · 1.5 kmC&R
C&R stretch — Frente cruce de carretera Vilaoruz-Foxas to 50 m aguas arriba de la presa de Saltadoiro.
Beat detail
Sorteo permit, all fish returned
Upstream: Frente cruce de carretera Vilaoruz-Foxas
Downstream: 50 m aguas arriba de la presa de Saltadoiro
Estreitos · 1.5 kmSorteo
Sorteo stretch — Pozo de Estreitos 200 m aguas abajo de la pasarela de Piagomayor to Puente del ferrocarril.
Beat detail
Sorteo (lottery) permit required
Upstream: Pozo de Estreitos 200 m aguas abajo de la pasarela de Piagomayor
Downstream: Puente del ferrocarril
Louredal · 1.0 kmSorteo
Sorteo stretch — Puente del ferrocarril to Pasarela de la Volta.
Beat detail
Sorteo (lottery) permit required
Upstream: Puente del ferrocarril
Downstream: Pasarela de la Volta
Volta · 1.0 kmFree Tue/Wed/Sat
Free Tue/Wed/Sat stretch — Pasarela de la Volta to Cabecera pozo Vixato, 150 m aguas abajo del puente La Negra.
Beat detail
Free on Tue/Wed/Sat, sorteo on other days
Upstream: Pasarela de la Volta
Downstream: Cabecera pozo Vixato, 150 m aguas abajo del puente La Negra
Gonzalvo · 1.3 kmSorteo
Sorteo stretch — Cabecera pozo Vixato to Anguieiro cabecera pozo Florentino.
Beat detail
Sorteo (lottery) permit required
Upstream: Cabecera pozo Vixato
Downstream: Anguieiro cabecera pozo Florentino
Beat map
Illustration · Studio Daisy
Permits & access
Free state water
State rod licence required for trout / salmon as applicable.
- Sorteo (lottery) beat allocation via Federación Asturiana de Pesca
- Licencia de pesca + permiso de coto required
- For 2026, salmon cupo is 1 fish per day and 1 per season, of which only 1 may be killed
- Check river-specific coto rules, vedados, and tackle restrictions before fishing.
What's coming
Plan ahead
5-day outlook
Water here around 22°C. Nothing cooler within range — carry a thermometer.
Gallery · 6
Río Eo from the Vía Verde Río Eo at A Pontenova Río Eo riverside at A Pontenova Río Eo at Baleira Salmon ladder at Pé da Viña, Río Eo Terrain map
Water quality (WFD)
- Ecology: Good
- Chemical: Unknown
WFD classification · ES018MSPFES244MAR002280
The full read · show the working · for Brown Trout · confidence 80%
How the 0 is built — score × weight = contribution
Temperature10 × 28%2.8
Flow15 × 22%3.3
Clarity95 × 18%17.1
Feeding Time60 × 13%7.8
Pressure80 × 7%5.6
Insect activity50 × 12%6.0
Limiting factor: Water temperature (21.5°C) is outside Brown Trout's preferred range (10–16°C)= 43
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
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
Seasons & zones
- Trout Third Sunday of March → 15 August
4 zones — different rules apply
- Coto salmonero
Main Eo salmon beats: Cairo, Estreitos, Louredal, Gonzalvo, La Peña, Reiboa, Louside, Las Barcas, El Carbayón, Pozón, Canabeiras — most shared with Galicia
- Salmon: Third Saturday of April → 15 July · 1 per day, 1 per season (kill limit)
- Sea trout: follows Trout
- Trout: Third Sunday of May → 31 July
- Coto salmonero sin muerte
Pedrido sin muerte beat (shared with Galicia)
- Salmon: Third Saturday of April → 15 July
- Sea trout: follows Trout
- Trout: Third Sunday of May → 31 July
- Coto parcial
Volta coto parcial — middle river
- Salmon: Third Saturday of April → 15 July · 1 per day, 1 per season (kill limit)
- Sea trout: follows Trout
- Trout: Third Sunday of March → 31 July
- Zona libre
Non-coto stretches of the Eo — free-access trout water
- Sea trout: follows Trout
- Trout: Third Sunday of March → 31 July
Sea trout: Variable seasonal (2026) — Eo — the Galicia-Asturias border river. Reo and salmon fishery with regulatory complexity (both regional administrations). Sea trout run from the estuary on rising water. Condition-sensitive; regulated access. Night fishing rules vary by bank (Galician vs Asturian side).
Salmon: Heritage only (2026) — Heritage Asturian salmon river — was classic Atlantic salmon and sea trout water until recent decades, now with negligible salmon runs. Listed as 'historic' to acknowledge identity without promoting salmon fishing. Brown trout and (limited) sea trout remain of interest.
Related guides
Booking & contacts
Clubs & associations