Freestone · Limestone · Haute-Provence

Verdon (Upper, Colmars–Castellane)

Verdon (Upper, Colmars–Castellane) terrain map
Terrain map

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

Prime · Brown Trout
Small Perdigón · 16-20
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.
75% confidence
What moved it
  • LevelProxyvia Arc (Bessans reach)
  • Water temp14.8°C
  • ClarityClear
Today’s fly
Small Perdigón
Small Perdigón16-20
Euro-nymph
Conditions on the water
Proxy gauge
Level
Steady
Proxy
via Arc (Bessans reach)
Water temp14.8°C
ClarityClear
Weather16°C
WindNW 6 km/h
Pressure1018 hPa
Rain · recent0.1 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
Ideal
15°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
Excellent — water temperature is working for you, but time of day is the limiting factor today.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 12 active hatches hour by hour 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 · July 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
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
Other water nearby · 4
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 75%
How the 81 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity59 × 12%7.1
Conditions total= 81
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
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
  • Trout2nd Saturday of March → 3rd Sunday of September
Related guides
Booking & contacts