Freestone · Limestone · Haute-Provence, FR

Bès

Bès — Le Bès

The Bès is a small Jurassic-limestone river in the Alpes-de-Haute-Provence that rises in the Trois-Évêchés massif and runs south to join the Bléone just above Digne.

Today · Closed season
Pheasant Tail Nymph (sz 18)
Forecast · Today
Closed season
Out of season. Try elsewhere.
45% projected
Today's fly
Pheasant Tail Nymph (sz 18)
Pheasant Tail Nymph (sz 18)
Conditions on the water · Today
Proxy gauge
Level
Rising
Proxy
via Arc
Water temp12.8°C
ClarityVery coloured
Weather17°C
WindN 15 km/h
Pressure1024 hPa
Rain · recent0.1 mm
Rain · ahead9.4 mm

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

Water temperature for Brown Trout
Ideal
13°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
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
9 ft #4 rod, floating line, 12 ft tapered leader to 4–5 lb fluoro tippet.
Likely species
Hatch timeline · todayPeak at 2pm

12pm(now) — Reed Smut

Stage: On emergersApproach: Emerger or dryActivity: 35%
Also:Autumn Olive25%Heather Fly25%Cinnamon Sedge21%
Peak emergence window10 food groups active

Peak activity at 2pm — Autumn Dun (Autumn Dun, 12 food groups active)

Sub-surface · on the nymphunder the surface

Hatch predictions

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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 · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
1
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
2
2
2
2
1
Blue Winged OliveHatch
1
2
2
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
  • Standard 1ère catégorie.
What's coming
Plan ahead
5-day outlook
Other water nearby · 3
Gallery · 2
  1. Bès — Le Bès
    Le Bès
  2. Terrain map of the venue
    Terrain map
About this water

The Bès is a small Jurassic-limestone river in the Alpes-de-Haute-Provence that rises in the Trois-Évêchés massif and runs south to join the Bléone just above Digne. Most people driving through the area are heading somewhere else — Digne itself is a quiet spa town, the main Provence tourist routes are further south. The Bès is therefore that rare thing: a perfectly good French wild-trout river that hardly anyone bothers to fish. It is textbook limestone water — clear, cold, aquifer-buffered, the flow steady all summer when the schist rivers of the Cévennes are in August retreat. The fish are modest in size but confident and well-fed; the limestone geology produces reliable caddis and Baetis hatches through the whole season. Stalking water more than anything else. Walk upstream, watch the pool tails, and wait for a fish to show. The best beats are in the middle Bès above the Clues de Barles, where the river runs through a narrow limestone valley that holds the water cool even in July.

  • Limestone
Water quality (WFD)
  • Ecology: Good
  • Chemical: Unknown

WFD classification · FRDR277A

The full read · show the working · for Brown Trout · confidence 45%
How the 0 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow55 × 22%12.1
Clarity15 × 18%2.7
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity60 × 12%7.2
Limiting factor: Water is very coloured — too coloured for Brown Trout= 65
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Arcproxy
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
A drop and clear would lift the flow and clarity scores.
Directions
Seasons & zones
  • Trout 2nd Saturday of March → 3rd Sunday of September
Related guides
Booking & contacts