Freestone · Granite · Lozère / Haute-Loire

Allier (Upper, Langogne–Langeac)

Langogne venue image

Above Langeac the Allier becomes a different river.

Poor · Brown Trout
Small Perdigón · 16-20
New ruleReported 8 Aug 2026

Severe drought restrictions (crise) in force

The bassin de l'Allier amont zone (Dept 48) is at crise — the second-highest French drought tier — under a préfectoral arrêté. Fishing itself is not named as prohibited, but water is severely restricted and flows are likely very low; fish with care and check locally.

Arrêté préfectoral n°37588

Temporary notices from official orders and recent fishery reports — they clear automatically once out of date.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

Poorlive now
Not the day for it
River temperature is the limiting factor today, not the flow. This is not the day to push it. Check the thermal advice above before you head out.
90% confidence
What moved it
  • Level0.07 mLast reading 2h ago
  • Water temp23.0°C
  • ClarityClear
Today's fly
Small Perdigón
Small Perdigón16-20
Euro-nymph
Conditions on the water
Live gauge
Level
Steady
0.07 m
Last reading 2h ago
Water temp23.0°C
ClarityClear
Weather32°C
WindSE 10 km/h
Pressure1021 hPa
Rain · recent7.7 mm
Rain · ahead2.9 mm

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

Water temperature for Brown Trout
Warm — slow
23°C est.ideal 1016°C
0°14°28°
How to fish it · for Brown Trout
When
Through the open trout season — March through September. Spring olives; sedges in summer; the upper Allier holds wild browns above the dam at Vichy.
Where
Pool tails, riffle heads, and the cushion behind boulders through the Massif Central headwaters. Above Vichy is wild trout-and-grayling water — no migratories pass the dam.
Method
Upstream dry to risers; nymph the deeper pockets between hatches. The headwater Allier is intimate — short casts, careful approach.
Kit
9 ft #4 — French freestone default. Floating line, 12 ft leader to 4 to 5 lb fluoro. Studded boots.
Why this works
Water at 23°C. This is the line where catch-and-release kills brown trout. Do not fish for them today.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 2 active hatches hour by hour with Pro.

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 2 with Pro.

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Evidence
Survey-backed · regionalModerate confidence

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

Updated 3 hours ago

Through the year
0–3 scale · August 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
Large Dark OliveHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
Autumn OliveHatch
1
2
1
GrannomHatch
1
1

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

Ranked for today
Brown Trout fly box

French nymph-first water. Fast current, technical presentation, weighted nymphs and emergers, with dry flies when fish rise.

Permits & access
Permit required — see local rules.
  • AAPPMA Haute-Loire
  • Fly-only parcours in several reaches — verify locally.
What's coming
Plan ahead
5-day outlook
Cooler water nearby · 1
Probably above the Brown Trout safety line — these are likely cooler, but carry a thermometer.
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

Above Langeac the Allier becomes a different river. The gorge work starts — proper basalt-and-granite gorge, cut deep, with long pools and pocket water between them — and the salmon water gives way to trout and grayling country. This is the Haute-Loire reach, running up through Monistrol and Brioude and then up into the volcanic highlands of the Lozère, where the river is clear, cold, and stony, and the crowds of the Brioude salmon beats are a memory. The wild brown trout here are honest fish — six to twelve inches the general run, with the occasional surprise in the gorge pools that makes you pay attention. The grayling are steady and rise well to small olives from May onwards. The hatches are proper freestone work: Baetis through spring, building caddis from May, good stoneflies in the rough water, and enough March Brown action in the lower sections to remind you that this is still a significant river even when it is behaving like a small one. Fish it with nymph through April and the first half of May, shift to dry fly once the caddis are out, and accept that the best water takes commitment to reach. The Haute-Loire landscape is part of the bargain.

  • Granite
Water quality (WFD)
  • EcologyGood
  • ChemicalFailing to achieve good
What this classification means

WFD chemical status Good → Failing to achieve good corrected to EEA WISE 2022 (3rd RBMP) classification for waterbody FRGR0141A (was a stale earlier-cycle value). Source: EEA WISE SWB_SurfaceWaterBody (discodata.eea.europa.eu), verified 2026-06-18.

WFD classification · FRGR0141A

The full read · show the working · for Brown Trout · confidence 90%
How the 4 is built — score × weight = contribution
Temperature2 × 28%0.6
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time55 × 13%7.2
Pressure80 × 7%5.6
Insect activity52 × 12%6.2
Limiting factor: Water temperature (23°C) is outside Brown Trout's preferred range (10–16°C)= 54
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
  • Trout 2nd Saturday of March3rd Sunday of September
  • Grayling 3rd Saturday of May3rd Sunday of September

    France national rule: grayling opens 3rd Saturday of May in all waters. In 1st category (salmonid) rivers, grayling closes with the trout season on the 3rd Sunday of September. Departmental regulations may impose additional restrictions. Always check the relevant département's 2026 arrêté préfectoral.

Related guides
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