Freestone · Limestone · Haute-Provence, FR

Verdon (Upper, Colmars–Castellane)

Verdon (Upper, Colmars–Castellane) — DSC00002 - VERDON SCHLUCHT (F)

The Verdon is the river that made Provence famous for the wrong reasons.

Marginal · Brown Trout
Small Perdigón · 16-20
Marginallive now
Slow going — pick your moments
River temperature is the limiting factor today, not the flow. Fish dawn or dusk if you go at all, and handle everything with extra care.
80% confidence
What moved it
  • LevelProxyvia Arc (Bessans reach)
  • Water temp20.1°C
  • ClarityVery colouredColouring up
Today's fly
Small Perdigón
Small Perdigón16-20
Euro-nymph
Conditions on the water
Proxy gauge
Level
Rising
Proxy
via Arc (Bessans reach)
Water temp20.1°C
ClarityVery coloured
Weather26°C
WindSE 9 km/h
Pressure1018 hPa
Rain · recent0.0 mm
Rain · ahead0.0 mm

No gauge on this water — conditions are inferred from Arc (Bessans reach). The trend transfers, the absolute level does not.

Water temperature for Brown Trout
Warm — slow
20°C est.ideal 1016°C
0°14°28°
How to fish it · for Brown Trout
When
Through the open trout season — late spring through autumn close. The Verdon upper runs cold and clear; fish once meltwater eases.
Where
Pool tails and pocket water through the Colmars-Castellane upper Verdon stretches. Haute-Provence freestone, intimate scale.
Method
Upstream dry to risers; dry-dropper through the riffles. The water reads clear — long leader, fine tippet. Move slowly, cast accurately.
Kit
8'6 ft #3 to 9 ft #4 — small mountain stream. Floating line, 9 to 12 ft leader to 4 lb fluoro. Studded boots.
Why this works
Water at 20.1°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots.
Hatch timeline · todayPeak at 5pm

Hatch predictions

Today's headline hatch shown — see all 9 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.

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
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.

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 Alpes-de-Haute-Provence
  • Several no-kill reserves above Colmars
  • Fly-only in sections.
What's coming
Plan ahead
5-day outlook
Water here around 20°C. Nothing cooler within range — carry a thermometer.
Gallery · 2
  1. Verdon (Upper, Colmars–Castellane) — DSC00002 - VERDON SCHLUCHT (F)
    DSC00002 - VERDON SCHLUCHT (F)
  2. Terrain map of the venue
    Terrain map
About this water

The Verdon is the river that made Provence famous for the wrong reasons. Everybody knows the Gorges du Verdon — the turquoise water, the 700-metre cliffs, the kayakers and the tourists and the coach parks. That is the lower river, downstream of Castellane, and it is not where you go fishing. The trout water is the upper Verdon, which rises at the Col d'Allos at 2,250 metres and runs south through Colmars-les-Alpes and down towards Castellane before everything changes character and the gorges begin. This upper stretch is classic high-Provençal trout water: Jurassic limestone bedrock, cold clean alpine water, wild brown trout that fish exactly the way a limestone river ought to fish — clear enough to stalk, quick enough to punish a sloppy cast, hatches that are short and intense and a joy when you catch them right. The best fishing is around Colmars and upstream, above the reservoirs. May through early September is the window; the altitude keeps the river cold long after the Cévennes rivers have given up. Fine tippets, small CDC dries, and the kind of careful wading that the turquoise water demands because you can see every stone — and so can the fish.

  • Limestone
Water quality (WFD)
  • EcologyModerate
  • ChemicalGood

WFD classification · FRDR265

The full read · show the working · for Brown Trout · confidence 80%
How the 27 is built — score × weight = contribution
Temperature24 × 28%6.7
Flow30 × 22%6.6
Clarity15 × 18%2.7
Feeding Time60 × 13%7.8
Pressure80 × 7%5.6
Insect activity49 × 12%5.9
Limiting factor: Water is very coloured — too coloured for Brown Trout= 35
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Arc (Bessans reach)proxy
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.
A drop and clear would lift the flow and clarity scores.
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
  • Trout 2nd Saturday of March3rd Sunday of September
Related guides
Booking & contacts