Freestone · Limestone · Alps / Savoie-Isère border

Guiers

Guiers terrain map
Terrain map

1st-category river on the Savoie-Isère border with ~1.

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
6°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 Activity2712% weight
Conditions
Level
Dry recently
No gauge reading
Water temp
6.2°C
Estimated
Clarity
Clear
Air temp
3°C
Wind
S 3 km/h
Calm
Pressure
1017 hPa
Rain · 48h
1.2 mm
No meaningful rain
Rain · ahead
13.7 mm
Moderate 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
March BrownHatch
2
3
2
Large StoneflyHatch
2
3
2
Olive UprightHatch
2
3
3
2
Alpine RhithrogenaHatch
2
3
3
2

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

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

1st-category river on the Savoie-Isère border with ~1.5 km no-kill course through limestone and alpine terrain where geology changes hands. Selective dry-fly water in pristine conditions. Spring through early autumn offers consistent fishing. Mountain character with responsive flow. Some sections may have specific regulations; verify with local AAPPMA.

  • 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