Stillwater · Limestone · Jura-edge / Ain (Bugey), FR

Chaley Lake

Chaley Lake terrain map

Artificial fly-fishing reservoir in exclusive salmonid mode.

Fair · Rainbow
Pheasant Tail Nymph · 14-18
New ruleReported 20 Aug 2026

Severe drought restrictions (crise) in force

VigiEau lists this venue's surface-water zone (Rivières du Bugey, dépt 01) at crise, under an official préfectoral drought arrêté. Fishing is not itself banned by it, but water levels are low — go gently on stressed fish.

Arrêté préfectoral n°37846 ↗

Temporary notices from official orders and recent fishery reports — they clear automatically once out of date. Always confirm locally before travelling.

Fairlive now
Reasonable autumn fishing likely at Chaley Lake
Water temperature is the limiting factor today, not the wave. Fish dawn or dusk if you go at all, and handle everything with extra care.
63% confidence

Chaley Lake is often best in spring through autumn.

What moved it
  • WindSE 9 km/hLight breeze
Today's fly
Pheasant Tail Nymph
Pheasant Tail Nymph14-18
Upstream
Conditions on the water
Estimate
Wind
Light breeze
SE 9 km/h
N
SE
from the south-east
WaveRipple
Water temp19.4°C
Air temp21°C
CloudOvercast
Pressure1020 hPa
Rain · recent0.0 mm

No gauge on this water — readings are regional estimates from weather, not a live gauge.

How to fish it · for Rainbow
When
Conditions are not ideal but fishable at Chaley Lake. The ripple should help fish move and feed more confidently. Very warm conditions — trout have a narrower safe zone of cool, oxygen-rich water. Fish only at first light or last light, use barbless hooks, keep fish in the water during release, and stop if fish struggle to recover.
Where
Start with Pheasant Tail Nymph (14-18) on a slow figure-of-eight retrieve. Rainbows respond to more active retrieves — try short strips between pauses. If that does not produce, switch depth or speed before changing the pattern entirely.
The plan
Plan A

Start with Pheasant Tail Nymph (14-18) on a slow figure-of-eight retrieve. Rainbows respond to more active retrieves — try short strips between pauses. If that does not produce, switch depth or speed before changing the pattern entirely.

Plan B

A fry-imitating pattern stripped through the margins can save a blank in autumn.

Watch for

Keep an eye on changing conditions — wind shifts and cloud breaks can trigger short feeding spells.

Bank

Bank-only venue. Fish from accessible margins, points, weed edges, and inflows.

Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 5 as a supporter.

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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
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
Rainbow fly box

Sight-nymphing and technical dry-fly fishing on very clear trout and grayling rivers, with strong mayfly and sedge windows and highly selective fish.

SS
Small Streamer
6-10 · Pattern
Swing
Permits & access
Permit required — see local rules.
  • AAPPMA permits.
What's coming
Plan ahead
5-day outlook
Condition match
63%
Cloud50%
Wind100%
Temp25%

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

Cooler water nearby · 3
Water here around 19°C — probably warm enough to stress Rainbow . These are likely cooler.
About this water

Artificial fly-fishing reservoir in exclusive salmonid mode. Day passes available. Brown and rainbow trout stocked. Spring through early autumn fishing. Good for developing fly skills. Check directly with venue for current stocking levels, catch limits, and facility details.

  • Reservoir
  • Limestone
Water quality (WFD)
  • Ecology: Moderate
  • Chemical: Unknown
What this classification means

WFD ecological status Good → Moderate corrected to EEA WISE 2022 (3rd RBMP) classification for waterbody FRDR10607 (was a stale earlier-cycle value). Source: EEA WISE SWB_SurfaceWaterBody (discodata.eea.europa.eu), verified 2026-06-18.

WFD classification · FRDR10607

Why this score
  • Wind conditions (ripple) closely match what this water fishes best in.
  • Sedge is in its seasonal window, boosting the chance of targeted feeding.
Directions
Seasons & zones
  • Trout 2nd Saturday of March → 3rd Sunday of September
Related guides
Booking & contacts