Stillwater · Granite · Brittany / Finistère (Monts d'Arrée)

Lac du Drennec

Lac du Drennec venue image
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110 ha lake in the Monts d'Arrée.

Marginal · Trout
Caddis Emerger · 12-16
A patient day, if you fancy it
Good wave on — drift country. Take your time — read the water before you cast.
41% confidence
limited data

This venue is often best in spring through autumn.

What moved it
  • WindW 17 km/hGentle breeze
Today’s fly
CE
Caddis Emerger12-16
Dead-drift
Conditions on the water
Live gauge
Wind
Gentle breeze
W 17 km/h
N
W
from the west
Wave20 cm ripple
Water temp
Air temp17°C
CloudBroken
Pressure1024 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for trout
When
The sedge is on. Buzzer may also come into play as the day warms. The ripple is helpful — fish should move onto the feed and a slow-drifted team or single wet will cover water well.
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.

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
2
2
1
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
Reservoir BuzzerHatch
2
3
3
3
3
3
2
Lake OliveHatch
2
3
3
3
3
3
2
Silverhorns & LonghornsHatch
1
2
2
2
1

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Trout fly box
Permits & access
Permit required — see local rules.
  • AAPPMA permits
  • Check local regulations.
What's coming
Plan ahead
5-day outlook
Condition match
65%
Cloud70%
Wind65%
Temp60%

A reasonable day here, though temperature isn't quite in the sweet spot.

Fishing better nearby · 5
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

110 ha lake in the Monts d'Arrée. Feral rainbow and wild brown trout. Best spring through early autumn fishing. Fly-fishing opportunity on this substantial lake. Check Finistère regulations for permits and daily catch limits. Car-accessible lake fishing with good potential.

  • Lake
  • Granite
Water quality (WFD)
  • EcologyGood
  • ChemicalUnknown

WFD classification · FRGR0069B

Why this score
  • Sedge is in its seasonal window, boosting the chance of targeted feeding.
Directions
Seasons & zones
  • Trout2nd Saturday of March → 3rd Sunday of September
Related guides
Booking & contacts