A no-kill fly reservoir at Chessy in the Marne-la-Vallée eastern suburbs, listed by the AAPPMA Le Pêcheur de Marne-la-Vallée, with related casting and fly-tying activity centred around Torcy. Not glamorous — and that's why it earns its place. The local club water: practical, slightly utilitarian, and entirely fishable from RER A. Stocked trout, fly-only management, the kind of venue that lets a Paris-based angler get a half-day in without writing off the weekend.
Rules at a glance
- Permit required
Hot — dawn/dusk onlyVery warm — fish only at dawn or dusk, handle carefully
Surface temperature is high enough to cause stress even with thermal stratification. The oxythermal squeeze narrows the comfort band — the thermocline may have warmer water than ideal and the deep water may be low in oxygen. Fish only during the coolest windows (first light to mid-morning, late evening). When you do catch, keep the fish in the water, use barbless hooks, and release without lifting. Playing time must be minimal. If fish are struggling to recover after release, stop fishing.
- DepthDo not target trout — the comfort band has effectively collapsed. Even deep-holding fish are thermally stressed.
- TimingDo not fish for trout until temperatures drop. Welfare risk is unacceptably high.
Reasonable late spring fishing likely at Étang BEP22 (Chessy)
Useful ripple, fishable wave. Worth a session if the wind holds.
Conditions are not ideal but fishable at Étang BEP22 (Chessy). The ripple should help fish move and feed more confidently. Spring conditions — the water has not split into warm surface and cooler deep layers yet. Fish can be anywhere in the top 10–12 feet; buzzers and nymphs on a slow retrieve will cover the feeding band.
51% confidence in this read
Live now
Conditions on the water
Trends shown where the gauge supports them
Wind
N 7 km/h
Light breeze
Wave
Ripple
Water temp
—
No reading
Air temp
30°C
Cloud
Clear
Pressure
1026 hPa
Rain · 24h
0.0 mm
No rain
Some readings unavailable — check directly before fishing.
How to fish · for rainbow trout
The brief
When · where · method · kit
How to fish it · for rainbow trout
When
March–October
Where
Start with Black Buzzer (12–16) on a As per local method. 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.
Method
Method not yet authored.
Kit
Kit not yet authored.
Today's tactical plan
The plan
Plan A · Plan B · what to watch · bank or boat
The plan
Plan A
Start with Black Buzzer (12–16) on a As per local method. 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
If fish refuse on top, drop to a buzzer under an indicator at different depths.
Watch for
Keep an eye on changing conditions — wind shifts and cloud breaks can trigger short feeding spells.
Bank
Bank fishing near inflows, dam walls, and weed beds. Move to find feeding fish.
Hatches & runs
What's on, when
Twelve months at a glance
Through the year
0–3 scale · May 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
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.
Today's fly · curated pack
Top pattern + the box
5 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.
- High temperatures may push fish deeper and reduce surface activity.
About this water · Lough note · 4 min read
Étang BEP22 (Chessy) · profile
Who this water suits
Strengths · watch-outs · best for
About this water
Étang BEP22 (Chessy), on the water
Field guide · contributor-editedÉtang BEP22 (Chessy) · about
What this water is
Background · character · contributors
About this water
A no-kill fly reservoir at Chessy in the Marne-la-Vallée eastern suburbs, listed by the AAPPMA Le Pêcheur de Marne-la-Vallée, with related casting and fly-tying activity centred around Torcy. Not glamorous — and that's why it earns its place. The local club water: practical, slightly utilitarian, and entirely fishable from RER A. Stocked trout, fly-only management, the kind of venue that lets a Paris-based angler get a half-day in without writing off the weekend.
- Reservoir
- Mixed
Étang BEP22 (Chessy) · directions
How to get to the water
Directions
Étang BEP22 (Chessy) · zones
Where the rules change
Seasons · zones · per-species rules
Seasons & zones
- TroutYear-round → Year-round
Étang BEP22 (Chessy) · permits
Good to know
Permits & access
Permit required — see local rules.
- AAPPMA permit required
- No-kill, fly-only
- Confirm current rules with AAPPMA Le Pêcheur de Marne-la-Vallée before fishing.
Étang BEP22 (Chessy)
No photos yet for this water.
A no-kill fly reservoir at Chessy in the Marne-la-Vallée eastern suburbs, listed by the AAPPMA Le Pêcheur de Marne-la-Vallée, with related casting and fly-tying activity centred around Torcy.
Species
Hot — dawn/dusk onlyVery warm — fish only at dawn or dusk, handle carefully
Surface temperature is high enough to cause stress even with thermal stratification. The oxythermal squeeze narrows the comfort band — the thermocline may have warmer water than ideal and the deep water may be low in oxygen. Fish only during the coolest windows (first light to mid-morning, late evening). When you do catch, keep the fish in the water, use barbless hooks, and release without lifting. Playing time must be minimal. If fish are struggling to recover after release, stop fishing.
- DepthDo not target trout — the comfort band has effectively collapsed. Even deep-holding fish are thermally stressed.
- TimingDo not fish for trout until temperatures drop. Welfare risk is unacceptably high.
Reasonable late spring fishing likely at Étang BEP22 (Chessy)
Useful ripple, fishable wave. Worth a session if the wind holds.
Conditions are not ideal but fishable at Étang BEP22 (Chessy). The ripple should help fish move and feed more confidently. Spring conditions — the water has not split into warm surface and cooler deep layers yet. Fish can be anywhere in the top 10–12 feet; buzzers and nymphs on a slow retrieve will cover the feeding band.
51% confidence in this read
Conditions
Wind
N 7 km/h
Light breeze
Wave
Ripple
Water temp
—
No reading
Air temp
30°C
Cloud
Clear
Pressure
1026 hPa
Rain · 24h
0.0 mm
No rain
Some readings unavailable — check directly before fishing.
Condition match
69%
Cloud70%
Wind100%
Temp25%
A reasonable day here, though temperature isn't quite in the sweet spot.
How to fish it · for rainbow trout
When
March–October
Where
Start with Black Buzzer (12–16) on a As per local method. 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.
Method
Method not yet authored.
Kit
Kit not yet authored.
The plan
Plan A
Start with Black Buzzer (12–16) on a As per local method. 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
If fish refuse on top, drop to a buzzer under an indicator at different depths.
Watch for
Keep an eye on changing conditions — wind shifts and cloud breaks can trigger short feeding spells.
Bank
Bank fishing near inflows, dam walls, and weed beds. Move to find feeding fish.
Why this score
- Wind conditions (ripple) closely match what this water fishes best in.
- High temperatures may push fish deeper and reduce surface activity.
Through the year
0–3 scale · May 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
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.
Permits & access
Permit required — see local rules.
- AAPPMA permit required
- No-kill, fly-only
- Confirm current rules with AAPPMA Le Pêcheur de Marne-la-Vallée before fishing.
Directions
About this water
A no-kill fly reservoir at Chessy in the Marne-la-Vallée eastern suburbs, listed by the AAPPMA Le Pêcheur de Marne-la-Vallée, with related casting and fly-tying activity centred around Torcy. Not glamorous — and that's why it earns its place. The local club water: practical, slightly utilitarian, and entirely fishable from RER A. Stocked trout, fly-only management, the kind of venue that lets a Paris-based angler get a half-day in without writing off the weekend.
- Reservoir
- Mixed
Seasons & zones
- TroutYear-round → Year-round
About this water · Lough note · 4 min read
A no-kill fly reservoir at Chessy in the Marne-la-Vallée eastern suburbs, listed by the AAPPMA Le Pêcheur de Marne-la-Vallée, with related casting and fly-tying activity centred around Torcy. Not glamorous — and that's why it earns its place. The local club water: practical, slightly utilitarian, and entirely fishable from RER A. Stocked trout, fly-only management, the kind of venue that lets a Paris-based angler get a half-day in without writing off the weekend.
Other water nearby · 3