Rules at a glance
- Free fishing
- Fly only
Water temperature for Brown Trout
Ideal13°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Through the Lombardy trout season — spring hatches build through the afternoon, sedges carry summer evenings, small dark flies matter into autumn. Glacial melt from the Adamello keeps flows elevated and cold through high summer.
Where
Pocket water and broken riffles in the upper valley above Vezza d'Oglio, opening into longer runs and glides as the valley widens toward Cedegolo and Darfo.
Method
Upstream nymph through the broken water; dry fly in the calmer glides once fish are looking up. No-Kill zones mandate artificials and barbless hooks — comply or fish elsewhere.
Kit
9 to 10 ft #4 for medium Alpine freestone. Floating line, 12 ft leader to 4 to 5 lb fluoro. Studded boots — the cobble here runs slick.
Why this works
Excellent — water temperature is working for you, but insect activity is the limiting factor today.
Likely species
Mayflies
Mayflies- Anglers curse mayfliesMost likelyLower confidenceNearest relative#20–22 · SpinnerGo tiny: 20-22 spent spinner, single fly, long tippet.
- Blue-winged oliveAlso possible#16–18 · DunDuns are up; a sherry spinner fall may follow.
- Turkey BrownAlso possibleLower confidence#14–16 · DunSmall spring dun on slower glides and margins.
- Ephemera vulgata (lake mayfly)Also possibleLower confidenceNearest relative#8–10–12 · NymphLarge lake/slow-river mayfly; burrows soft sediment.
Caddisflies
Caddisflies- Green SedgeMost likelyLower confidenceNearest relative#10–12–14–16 · NymphFree-living green caddis larva; fast stony riffles.
- Net-spinning caddis (S. Europe)Also possibleLower confidenceNearest relative#12–14–16 · PupaWidespread riffle net-spinner; evening emergence.
- GrannomAlso possibleNearest relative#14–16 · PupaPupa first, then dries as the adults come off.
- Stone-case caddisAlso possibleLower confidenceNearest relative#14–16–18 · NymphTiny stone-cased larva; clean gravel riffles.
Stoneflies
Stoneflies- Little Brown StoneMost likelyLower confidence#16–18 · AdultSmall dark stone nymph or adult in early spring.
- NeedleflyAlso possibleLower confidenceNearest relative#16–18 · AdultSmall slender stonefly; clean, cold headwater riffles.
Hatch timeline · todayPeak at 14h
Hatch predictions
Today's headline hatch shown — see all 12 active hatches hour by hour as a supporter.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Supporters see the full sub-surface read.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Top prey shown — see all 2 as a supporter.
Start free trial14-day free trial. Cancel anytime.
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
Freshwater ShrimpHatch
2
3
3
3
3
3
3
3
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
Autumn OliveHatch
1
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Fly box · Brown Trout
18-22 · Pattern
Upstream dry, in the film
Permits & access
Permit required — see local rules.
- From 2026, a single Regione Lombardia regional fishing licence (€23/year) is sufficient for Bacino 10 Vallecamonica — no separate association membership
- Marble trout are the flagship species and should be treated as catch-and-release
- Grayling are fully protected in this basin — no retention and no targeting, year-round
- Several No-Kill artificial-only zones exist through the valley (Sonico-Malonno, Ceto-Cerveno, Darfo Boario Terme, Cedegolo) — check current signage and the prontuario at bacinopesca10vallecamonica.it.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
Terrain map
The full read · show the working · for Brown Trout · confidence 75%
How the 81 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow95 × 22%20.9
Clarity75 × 18%13.5
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity29 × 12%3.5
Conditions total= 81
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
Directions
Seasons & zones
- Trout varies_by_water → varies_by_water
- Grayling no_open_season → no_open_season
The Bacino 10 prontuario lists temolo as 'DIVIETO DI PESCA' (fishing prohibited) throughout the Oglio pre-lacuale and its tributaries as far as the mouth into Lake Iseo — this is full protection, not catch-and-release. If one is hooked incidentally while trout fishing, release it immediately without lifting it from the water.
All grayling must be returned — retention is prohibited here.
- Marble trout varies_by_water → varies_by_water
Related guides
Booking & contacts
Oglio (Val Camonica)
Water temperature for Brown Trout
Ideal13°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Through the Lombardy trout season — spring hatches build through the afternoon, sedges carry summer evenings, small dark flies matter into autumn. Glacial melt from the Adamello keeps flows elevated and cold through high summer.
Where
Pocket water and broken riffles in the upper valley above Vezza d'Oglio, opening into longer runs and glides as the valley widens toward Cedegolo and Darfo.
Method
Upstream nymph through the broken water; dry fly in the calmer glides once fish are looking up. No-Kill zones mandate artificials and barbless hooks — comply or fish elsewhere.
Kit
9 to 10 ft #4 for medium Alpine freestone. Floating line, 12 ft leader to 4 to 5 lb fluoro. Studded boots — the cobble here runs slick.
Why this works
Excellent — water temperature is working for you, but insect activity is the limiting factor today.
Likely species
Mayflies
- Anglers curse mayfliesMost likelyLower confidenceNearest relative#20–22 · SpinnerGo tiny: 20-22 spent spinner, single fly, long tippet.
- Blue-winged oliveAlso possible#16–18 · DunDuns are up; a sherry spinner fall may follow.
- Turkey BrownAlso possibleLower confidence#14–16 · DunSmall spring dun on slower glides and margins.
- Ephemera vulgata (lake mayfly)Also possibleLower confidenceNearest relative#8–10–12 · NymphLarge lake/slow-river mayfly; burrows soft sediment.
Caddisflies
- Green SedgeMost likelyLower confidenceNearest relative#10–12–14–16 · NymphFree-living green caddis larva; fast stony riffles.
- Net-spinning caddis (S. Europe)Also possibleLower confidenceNearest relative#12–14–16 · PupaWidespread riffle net-spinner; evening emergence.
- GrannomAlso possibleNearest relative#14–16 · PupaPupa first, then dries as the adults come off.
- Stone-case caddisAlso possibleLower confidenceNearest relative#14–16–18 · NymphTiny stone-cased larva; clean gravel riffles.
Stoneflies
- Little Brown StoneMost likelyLower confidence#16–18 · AdultSmall dark stone nymph or adult in early spring.
- NeedleflyAlso possibleLower confidenceNearest relative#16–18 · AdultSmall slender stonefly; clean, cold headwater riffles.
Hatch timeline · todayPeak at 14h
Hatch predictions
Today's headline hatch shown — see all 12 active hatches hour by hour as a supporter.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Supporters see the full sub-surface read.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Top prey shown — see all 2 as a supporter.
Start free trial14-day free trial. Cancel anytime.
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
Freshwater ShrimpHatch
2
3
3
3
3
3
3
3
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
Autumn OliveHatch
1
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Fly box · Brown Trout
18-22 · Pattern
Upstream dry, in the film
Permits & access
Permit required — see local rules.
- From 2026, a single Regione Lombardia regional fishing licence (€23/year) is sufficient for Bacino 10 Vallecamonica — no separate association membership
- Marble trout are the flagship species and should be treated as catch-and-release
- Grayling are fully protected in this basin — no retention and no targeting, year-round
- Several No-Kill artificial-only zones exist through the valley (Sonico-Malonno, Ceto-Cerveno, Darfo Boario Terme, Cedegolo) — check current signage and the prontuario at bacinopesca10vallecamonica.it.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
Terrain map
The full read · show the working · for Brown Trout · confidence 75%
How the 81 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow95 × 22%20.9
Clarity75 × 18%13.5
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity29 × 12%3.5
Conditions total= 81
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
Directions
Seasons & zones
- Trout varies_by_water → varies_by_water
- Grayling no_open_season → no_open_season
The Bacino 10 prontuario lists temolo as 'DIVIETO DI PESCA' (fishing prohibited) throughout the Oglio pre-lacuale and its tributaries as far as the mouth into Lake Iseo — this is full protection, not catch-and-release. If one is hooked incidentally while trout fishing, release it immediately without lifting it from the water.
All grayling must be returned — retention is prohibited here.
- Marble trout varies_by_water → varies_by_water
Related guides
Booking & contacts