The highest of the Ogwen Valley AA waters at six hundred and seventy-eight metres — a tiny Carneddau cwm lake, two hundred and fifty by a hundred and fifty metres, in the cwm beneath Pen yr Ole Wen and Carnedd Dafydd. Excellent wild brown trout to a pound on a water you can walk round in twenty minutes if you don't fish it. Traditional fly only, no bubble float. Forty-five to sixty minutes' walk in from the road.
A patient day, if you fancy it
Useful ripple, fishable wave. Take your time — read the water before you cast.
34% confidence — limited data
Live now
Conditions on the water
Trends shown where the gauge supports them
Wind
SW 33 km/h
Fresh breeze
Wave
60 cm wave
Water temp
—
No reading
Air temp
8°C
Cloud
Overcast
Pressure
990 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
Late April–June; evening rises through summer
Where
Work Gold-ribbed Hare's Ear on the bob and Pheasant Tail Nymph on the point.
Today's tactical plan
The plan
Plan A · Plan B · what to watch · bank or boat
The plan
Plan A
Work Gold-ribbed Hare's Ear on the bob and Pheasant Tail 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 — at anchor
Windy conditions suit anchoring in productive areas rather than open-water drifting.
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
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
Daddy Long LegsHatch
2
3
2
Murrough (Great Red Sedge)Hatch
1
2
1
Lake OliveHatch
1
2
2
2
2
2
1
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 (windy) are not ideal for this water.
- Buzzers are in their seasonal window, boosting the chance of targeted feeding.
Access · 1
Check the current rules, permits and access before travelling.
Day ticket via Fishing PassportOgwen Valley Angling Association (via Fishing Passport)
Wild brown troutFly only
Highest OVAA water at 678m — tiny Carneddau cwm lake beneath Pen yr Ole Wen. Excellent wild brown trout to 1 lb. Traditional fly only, no bubble float. 45–60 min walk.
OVAA day ticket via Passport. Traditional fly only — no bubble float. 45–60 min walk in. Exposed mountain water. EA/NRW rod licence required.
Arrange access →About this water · Lough note · 4 min read
Ffynnon Lloer · profile
Who this water suits
Strengths · watch-outs · best for
About this water
Ffynnon Lloer, on the water
Field guide · contributor-editedFfynnon Lloer · about
What this water is
Background · character · contributors
About this water
The highest of the Ogwen Valley AA waters at six hundred and seventy-eight metres — a tiny Carneddau cwm lake, two hundred and fifty by a hundred and fifty metres, in the cwm beneath Pen yr Ole Wen and Carnedd Dafydd. Excellent wild brown trout to a pound on a water you can walk round in twenty minutes if you don't fish it. Traditional fly only, no bubble float. Forty-five to sixty minutes' walk in from the road.
- Lake
- Ordovician volcanics sediment
Ffynnon Lloer · directions
How to get to the water
Directions
Ffynnon Lloer
The highest of the Ogwen Valley AA waters at six hundred and seventy-eight metres — a tiny Carneddau cwm lake, two hundred and fifty by a hundred and fifty metres, in the cwm beneath Pen yr Ole Wen and Carnedd Dafydd.
Species
A patient day, if you fancy it
Useful ripple, fishable wave. Take your time — read the water before you cast.
34% confidence — limited data
Conditions
Wind
SW 33 km/h
Fresh breeze
Wave
60 cm wave
Water temp
—
No reading
Air temp
8°C
Cloud
Overcast
Pressure
990 hPa
Rain · 24h
0.0 mm
No rain
Some readings unavailable — check directly before fishing.
Condition match
41%
Cloud70%
Wind30%
Temp25%
Conditions are away from this venue's sweet spot — it usually fishes best in ripple wind with mixed skies.
How to fish it · for brown trout
When
Late April–June; evening rises through summer
Where
Work Gold-ribbed Hare's Ear on the bob and Pheasant Tail Nymph on the point.
The plan
Plan A
Work Gold-ribbed Hare's Ear on the bob and Pheasant Tail 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 — at anchor
Windy conditions suit anchoring in productive areas rather than open-water drifting.
Why this score
- Wind conditions (windy) are not ideal for this water.
- Buzzers are in their seasonal window, boosting the chance of targeted feeding.
Through the year
0–3 scale · June highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
Daddy Long LegsHatch
2
3
2
Murrough (Great Red Sedge)Hatch
1
2
1
Lake OliveHatch
1
2
2
2
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Access · 1
Check the current rules, permits and access before travelling.
Day ticket via Fishing PassportOgwen Valley Angling Association (via Fishing Passport)
Wild brown troutFly only
Highest OVAA water at 678m — tiny Carneddau cwm lake beneath Pen yr Ole Wen. Excellent wild brown trout to 1 lb. Traditional fly only, no bubble float. 45–60 min walk.
OVAA day ticket via Passport. Traditional fly only — no bubble float. 45–60 min walk in. Exposed mountain water. EA/NRW rod licence required.
Arrange access →Directions
About this water
The highest of the Ogwen Valley AA waters at six hundred and seventy-eight metres — a tiny Carneddau cwm lake, two hundred and fifty by a hundred and fifty metres, in the cwm beneath Pen yr Ole Wen and Carnedd Dafydd. Excellent wild brown trout to a pound on a water you can walk round in twenty minutes if you don't fish it. Traditional fly only, no bubble float. Forty-five to sixty minutes' walk in from the road.
- Lake
- Ordovician volcanics sediment
About this water · Lough note · 4 min read
The highest of the Ogwen Valley AA waters at six hundred and seventy-eight metres — a tiny Carneddau cwm lake, two hundred and fifty by a hundred and fifty metres, in the cwm beneath Pen yr Ole Wen and Carnedd Dafydd. Excellent wild brown trout to a pound on a water you can walk round in twenty minutes if you don't fish it. Traditional fly only, no bubble float. Forty-five to sixty minutes' walk in from the road.
Other water nearby · 5