- Ecology: Moderate
- Chemical: Unknown
WFD classification · ITARW03BB13600020TN
Rules at a glance
- Licence required
Water temperature for Brown Trout
Warm — slow16°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Through the Italian trout season — afternoon hatches in spring; sedges through summer; small dark flies into autumn. Valsugana fishes lower elevation than the upper Trentino rivers.
Where
Pool tails and the deeper edges of pockets through the Valsugana stretches. The Brenta widens through the lower valley into longer glides.
Method
Upstream nymph through the broken water; dry to risers in the glides. Italian No-Kill stretches mandate single barbless — comply or fish elsewhere.
Kit
9 to 10 ft #4 for medium freestone with Alpine clarity. Floating line, 12 ft leader to 4 to 5 lb fluoro. Studded boots — Alpine cobble runs slick.
Why this works
Excellent — water temperature is working for you, but time of day is the limiting factor today.
Hatch timeline · todayPeak at 6pm
Hatch predictions
Today's headline hatch shown — see all 12 active hatches hour by hour with Pro.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 3 guilds with Pro.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey
Hatch predictions
Top prey shown — see all 3 with Pro.
Start free trial14-day free trial. Cancel anytime.
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
Alpine RhithrogenaHatch
2
3
3
2
Sculpin / Baitfish (Rivers)Hatch
2
3
3
3
3
3
3
3
2
March BrownHatch
2
3
2
Large StoneflyHatch
2
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Brown Trout fly box
12-16 · Pattern
Upstream dry, on top
Permits & access
Permit required — see local rules.
- Italian fishing license (permesso di pesca) varies by provincia (province)
- Barbless hooks often required on protected waters
- Catch limits may apply.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
The Brenta river flowing through Borgo Valsugana Terrain map
Water quality (WFD)
The full read · show the working · for Brown Trout · confidence 75%
How the 80 is built — score × weight = contribution
Temperature95 × 28%26.6
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity65 × 12%7.8
Conditions total= 80
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
- Trout 2026-02-15 → 2026-10-07
- Grayling varies_by_water → varies_by_water
Italian Alpine grayling (temolo) — season varies by zona and managed by Trentino associations. Many grayling sections are no-retention or have strict seasonal restrictions. Check with local association or pescatrentino.it for specific Brenta/Valsugana section rules before fishing.
Rules are set at province or association level — check locally.
- Marble trout 2026-03-01 → 2026-09-30
Related guides
Booking & contacts
Brenta (Trentino)
Water temperature for Brown Trout
Warm — slow16°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Through the Italian trout season — afternoon hatches in spring; sedges through summer; small dark flies into autumn. Valsugana fishes lower elevation than the upper Trentino rivers.
Where
Pool tails and the deeper edges of pockets through the Valsugana stretches. The Brenta widens through the lower valley into longer glides.
Method
Upstream nymph through the broken water; dry to risers in the glides. Italian No-Kill stretches mandate single barbless — comply or fish elsewhere.
Kit
9 to 10 ft #4 for medium freestone with Alpine clarity. Floating line, 12 ft leader to 4 to 5 lb fluoro. Studded boots — Alpine cobble runs slick.
Why this works
Excellent — water temperature is working for you, but time of day is the limiting factor today.
Hatch timeline · todayPeak at 6pm
Hatch predictions
Today's headline hatch shown — see all 12 active hatches hour by hour with Pro.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 3 guilds with Pro.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey
Hatch predictions
Top prey shown — see all 3 with Pro.
Start free trial14-day free trial. Cancel anytime.
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
Alpine RhithrogenaHatch
2
3
3
2
Sculpin / Baitfish (Rivers)Hatch
2
3
3
3
3
3
3
3
2
March BrownHatch
2
3
2
Large StoneflyHatch
2
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Brown Trout fly box
12-16 · Pattern
Upstream dry, on top
Permits & access
Permit required — see local rules.
- Italian fishing license (permesso di pesca) varies by provincia (province)
- Barbless hooks often required on protected waters
- Catch limits may apply.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
The Brenta river flowing through Borgo Valsugana Terrain map
Water quality (WFD)
- Ecology: Moderate
- Chemical: Unknown
WFD classification · ITARW03BB13600020TN
The full read · show the working · for Brown Trout · confidence 75%
How the 80 is built — score × weight = contribution
Temperature95 × 28%26.6
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity65 × 12%7.8
Conditions total= 80
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
- Trout 2026-02-15 → 2026-10-07
- Grayling varies_by_water → varies_by_water
Italian Alpine grayling (temolo) — season varies by zona and managed by Trentino associations. Many grayling sections are no-retention or have strict seasonal restrictions. Check with local association or pescatrentino.it for specific Brenta/Valsugana section rules before fishing.
Rules are set at province or association level — check locally.
- Marble trout 2026-03-01 → 2026-09-30
Related guides
Booking & contacts