Karst · Limestone · Burgundy / Côte-d'Or, FR

Armançon (Upper Trout Reach)

Armançon (Upper Trout Reach) — Armançon Nuits
Prime · Grayling
Pink Grayling Bug · Hook 16
Primelive now
About as good as it gets
River steady at a fishable height. On the feed top to bottom — start on the rises with a dry, drop a nymph if they stay down.
90% confidence
What moved it
  • LevelProxyvia Loue
  • Water temp13.6°C
  • ClarityClear
Today's fly
Pink Grayling Bug
Pink Grayling BugHook 16
in season · matches water height · all-rounder
Conditions on the water
Proxy gauge
Level
Steady
Proxy
via Loue
Water temp13.6°C
ClarityClear
Weather18°C
WindW 13 km/h
Pressure1025 hPa
Rain · recent0.0 mm
Rain · ahead0.7 mm

No gauge on this water — conditions are inferred from Loue. The trend transfers, the absolute level does not.

Water temperature for Grayling
Ideal
14°C est.ideal 4–14°C
0°14°28°
How to fish it · for Grayling
When
Midday window — grayling feed best from late morning into early afternoon.
Where
Work runs and glides — grayling shoal in the bottom third of the water column.
Method
Tight-line nymph the bottom third with weighted patterns.
Kit
10 ft #3 rod, floating line, long leader to 4 lb fluoro for nymphs.
Why this works
Excellent — water temperature is right today, though insect activity could be better.
Likely species
Stoneflies
Hatch timeline · todayPeak at 15:00

Hatch predictions

Today's headline hatch shown — see all 12 active hatches hour by hour as a supporter.

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Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 3 guilds as a supporter.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 2 as a supporter.

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Evidence
Survey-backed · regionalHigh confidence

Backed by regional invertebrate surveys; no sampling on this exact reach yet.

Through the year
0–3 scale · October 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
2
2
2
1
Freshwater ShrimpHatch
2
3
3
3
3
3
3
3
3
3
3
2
Brown SedgeHatch
2
3
3
3
2
Small SpurwingHatch
2
3
3
3
2
Small Dark OliveHatch
2
3
3
3
2

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

Ranked for today
Fly box · Grayling
Small Perdigón
Small Perdigón
Hook 14–18 · Fly
in season · matches water height
Permits & access
Permit required — see local rules.
  • AAPPMA Montbard / Semur-en-Auxois
  • Standard 1ère catégorie.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Serein
34 km
86
Brown trout · Grayling
Cousin
35 km
Brown trout
Pisciculture Moulin Tala
40 km
Rainbow trout
Cure
41 km
Brown trout
Ferme piscicole du Moulin de la Petite Verrière
49 km
Rainbow trout · Brown trout · Char
Gallery · 2
  1. Armançon (Upper Trout Reach) — Armançon Nuits
    Armançon Nuits
  2. Terrain map of the venue
    Terrain map
Water quality (WFD)
  • Ecology: Moderate
  • Chemical: Good
What this classification means

WFD chemical status Failing to achieve good → Good corrected to EEA WISE 2022 (3rd RBMP) classification for waterbody FRHR61C (was a stale earlier-cycle value). Source: EEA WISE SWB_SurfaceWaterBody (discodata.eea.europa.eu), verified 2026-06-18.

WFD classification · FRHR61C

The full read · show the working · for Grayling · confidence 90%
How the 87 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time100 × 13%13.0
Pressure80 × 7%5.6
Insect activity63 × 12%7.6
Conditions total= 87
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Loueproxy
Prey activitysurvey-backed invertebrate datasurvey
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 2.º Saturday de March → 3.º Sunday de September
  • Grayling 3.º Saturday de May → 31 December

    France national rule: grayling opens 3rd Saturday of May in all waters. In 2nd category waters, grayling remains open until 31 December. Departmental regulations may impose earlier closing dates. Always check the relevant département's 2026 arrêté préfectoral.

Related guides
Grayling Playbookgrayling tacticsPyrenees PlaybookFrench riversEuro Nymphingsubsurface methods
Booking & contacts