Alfilorios is a small thing with a complicated job: it supplies Oviedo with drinking water and, since 2020, doubles as a trout coto — the sort of pragmatic arrangement Asturias does rather well. The fishing nearly didn't survive. The original stock wore thin faster than anyone had budgeted for, and the answer was to put back adult native brown trout, fish too old for the rivers, to keep the place ticking over. It is bank fishing only, three rods a day and three fish, so you fish it slowly and you fish it properly. Nymph the margins, watch for an evening rise, and don't expect a crowd. For a reservoir that exists to fill taps, it fishes with surprising charm.
A patient day, if you fancy it
Good wave on — drift country. Take your time — read the water before you cast.
39% confidence — limited data
Live now
Conditions on the water
Trends shown where the gauge supports them
Wind
N 5 km/h
Calm
Wave
Ripple
Water temp
—
No reading
Air temp
15°C
Cloud
Overcast
Pressure
1016 hPa
Rain · 24h
0.0 mm
No rain
Some readings unavailable — check directly before fishing.
How to fish · for brown trout
The brief
When · where · method · kit
How to fish it · for brown trout
When
March to August (coto open season). Quiet weekday permits are easiest to come by.
Where
Set up a broadside drift and cover the water systematically. Work a bushy searching pattern on the bob and drop a contrasting nymph on the point.
Today's tactical plan
The plan
Plan A · Plan B · what to watch · bank or boat
The plan
Plan A
Set up a broadside drift and cover the water systematically. Work a bushy searching pattern on the bob and drop a contrasting nymph on the point.
Plan B
If the main plan is not working, switch to a smaller, more imitative pattern fished slower and deeper. A change of drift angle can also make a difference.
Watch for
Evening tends to be the best period in summer — stay late if you can for a sedge or spinner fall.
Boat — drift
A gentle ripple is ideal for drifting — broadside drift covering the wind lanes should be productive.
Hatches & runs
What's on, when
Twelve months at a glance
Through the year
0–3 scale · June highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Green PeterHatch
2
3
2
Murrough (Great Red Sedge)Hatch
2
3
2
Mayfly (Green Drake)Hatch
2
2
Daddy Long LegsHatch
2
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Today's fly · curated pack
Top pattern + the box
6 patterns from this venue's curated pack
Evidence
Why today scores what it does
The factors driving today's verdict
Why this score
- Wind conditions (ripple) closely match what this water fishes best in.
About this water · Lough note · 4 min read
Embalse de los Alfilorios · profile
Who this water suits
Strengths · watch-outs · best for
About this water
Embalse de los Alfilorios, on the water
Field guide · contributor-editedEmbalse de los Alfilorios · about
What this water is
Background · character · contributors
About this water
Alfilorios is a small thing with a complicated job: it supplies Oviedo with drinking water and, since 2020, doubles as a trout coto — the sort of pragmatic arrangement Asturias does rather well. The fishing nearly didn't survive. The original stock wore thin faster than anyone had budgeted for, and the answer was to put back adult native brown trout, fish too old for the rivers, to keep the place ticking over. It is bank fishing only, three rods a day and three fish, so you fish it slowly and you fish it properly. Nymph the margins, watch for an evening rise, and don't expect a crowd. For a reservoir that exists to fill taps, it fishes with surprising charm.
- Reservoir
- Limestone
Embalse de los Alfilorios · directions
How to get to the water
Directions
Embalse de los Alfilorios · permits
Good to know
Permits & access
Permit required — see local rules.
- Asturias licence + Alfilorios coto permit required
- Bank only — no boats (drinking-water reservoir)
- Limited to 3 anglers/day and 3 trout/angler/day; sin muerte once the cup is reached
- Stocked with adult native brown trout.
Embalse de los Alfilorios
Terrain map
Alfilorios is a small thing with a complicated job: it supplies Oviedo with drinking water and, since 2020, doubles as a trout coto — the sort of pragmatic arrangement Asturias does rather well.
Species
A patient day, if you fancy it
Good wave on — drift country. Take your time — read the water before you cast.
39% confidence — limited data
Conditions
Wind
N 5 km/h
Calm
Wave
Ripple
Water temp
—
No reading
Air temp
15°C
Cloud
Overcast
Pressure
1016 hPa
Rain · 24h
0.0 mm
No rain
Some readings unavailable — check directly before fishing.
Condition match
79%
Cloud70%
Wind100%
Temp60%
A good match for this venue — most conditions are close to what it fishes best in.
Reservoir levelas of 1 Jun
┄ 88% 10-yr norm
▬ Steady
88% full
About normal
▬0 ptsvs seasonal norm
▬0 ptsvs last year
▬0 ptsthis week
How to fish it · for brown trout
When
March to August (coto open season). Quiet weekday permits are easiest to come by.
Where
Set up a broadside drift and cover the water systematically. Work a bushy searching pattern on the bob and drop a contrasting nymph on the point.
The plan
Plan A
Set up a broadside drift and cover the water systematically. Work a bushy searching pattern on the bob and drop a contrasting nymph on the point.
Plan B
If the main plan is not working, switch to a smaller, more imitative pattern fished slower and deeper. A change of drift angle can also make a difference.
Watch for
Evening tends to be the best period in summer — stay late if you can for a sedge or spinner fall.
Boat — drift
A gentle ripple is ideal for drifting — broadside drift covering the wind lanes should be productive.
Why this score
- Wind conditions (ripple) closely match what this water fishes best in.
Through the year
0–3 scale · June highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Green PeterHatch
2
3
2
Murrough (Great Red Sedge)Hatch
2
3
2
Mayfly (Green Drake)Hatch
2
2
Daddy Long LegsHatch
2
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Permits & access
Permit required — see local rules.
- Asturias licence + Alfilorios coto permit required
- Bank only — no boats (drinking-water reservoir)
- Limited to 3 anglers/day and 3 trout/angler/day; sin muerte once the cup is reached
- Stocked with adult native brown trout.
Directions
About this water
Alfilorios is a small thing with a complicated job: it supplies Oviedo with drinking water and, since 2020, doubles as a trout coto — the sort of pragmatic arrangement Asturias does rather well. The fishing nearly didn't survive. The original stock wore thin faster than anyone had budgeted for, and the answer was to put back adult native brown trout, fish too old for the rivers, to keep the place ticking over. It is bank fishing only, three rods a day and three fish, so you fish it slowly and you fish it properly. Nymph the margins, watch for an evening rise, and don't expect a crowd. For a reservoir that exists to fill taps, it fishes with surprising charm.
- Reservoir
- Limestone
About this water · Lough note · 4 min read
Alfilorios is a small thing with a complicated job: it supplies Oviedo with drinking water and, since 2020, doubles as a trout coto — the sort of pragmatic arrangement Asturias does rather well. The fishing nearly didn't survive. The original stock wore thin faster than anyone had budgeted for, and the answer was to put back adult native brown trout, fish too old for the rivers, to keep the place ticking over. It is bank fishing only, three rods a day and three fish, so you fish it slowly and you fish it properly. Nymph the margins, watch for an evening rise, and don't expect a crowd. For a reservoir that exists to fill taps, it fishes with surprising charm.
Fishing better nearby · 5