Freestone · Limestone · Jura-edge / Ain (Varambon–Rhône)

Ain (lower / Plaine de l'Ain)

Ain (lower / Plaine de l'Ain) terrain map
Terrain map

The Ain from Varambon to the Rhône confluence flows through limestone with multiple designated no-kill beats and fly-only sections.

Species

A proper day on the water

Low and clear — careful approach country. Stay small, stay accurate.

55% confidence in this read
Water temperature for grayling
Ideal
7°C est.ideal 4–14°C
0°14°28°
Why this score · for grayling
  • Temperature10028% weight
  • Flow6022% weight
  • Clarity8518% weight
  • Feeding Time1013% weight
  • Pressure807% weight
  • Prey Activity2812% weight
Conditions
Level
Dry recently
No gauge reading
Water temp
7.0°C
Estimated
Clarity
Clear
Air temp
6°C
Wind
SE 4 km/h
Calm
Pressure
1016 hPa
Rain · 48h
0.3 mm
No meaningful rain
Rain · ahead
3.7 mm
Light rain · next 48h

Live readings — water temperature is an estimate where the gauge does not record it.

How to fish it · for grayling
When
Nymphing can work through most of the day.
Where
Cover mixed depths.
Method
Start with tight-line nymphs and adjust if fish rise or drift higher.
Kit
10 ft #3 rod, floating line, long leader to 4 lb fluoro for nymphs.
Why this works
Good conditions. Temperature is favourable (100), Feeding time is weakest (10).
Through the year
0–3 scale · May highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
1
Grayling seasonSeason
1
2
2
2
1
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
1

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

Permits & access
Permit required — see local rules.
  • AAPPMA permits.
Directions
Apple MapsGoogle Maps
About this water

The Ain from Varambon to the Rhône confluence flows through limestone with multiple designated no-kill beats and fly-only sections. Stable spring-fed character, prolific insect life, selective trout and grayling. Chalk-stream water where presentation matters more than fly choice. Spring through early autumn. Some beats private; public access on certain stretches. Verify local regulations.

  • Limestone
Seasons & zones
  • Trout2nd Saturday of March → 3rd Sunday of September
  • Grayling3rd Saturday of May → 3rd Sunday of September
Other water nearby · 5
Booking & contacts