Freestone · Mixed · Alaska

Brooks River (Katmai)

Two brown bears standing in the rushing water below Brooks Falls on the Brooks River, Katmai National Park, Alaska.
Prime · Rainbow Trout
Bead · 6-10
Primelive now
About as good as it gets
Low and clear — careful approach country. Take your time — read the water before you cast.
90% confidence
What moved it
  • LevelLight rain recentlyNo gauge reading
  • Water temp11.9°C
  • ClarityClear
Today's fly
BE
Bead6-10
Dead-drift, sub-surface
Conditions on the water
Estimate
Level
Light rain recently
No gauge reading
Water temp11.9°C
ClarityClear
Weather9°C
WindE 12 km/h
Pressure1013 hPa
Rain · recent7.7 mm
Rain · ahead5.3 mm

No gauge on this water — readings are regional estimates from weather, not a live gauge.

Water temperature for Rainbow Trout
Ideal
12°C est.ideal 10–18°C
0°14°28°
How to fish it · for Rainbow 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.
Why this works
Excellent — water temperature is right today, though insect activity could be better.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 3 active hatches hour by hour with Pro.

Start free trial

14-day free trial. Cancel anytime.

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 2 guilds with Pro.

Start free trial

14-day free trial. Cancel anytime.

Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 2 with Pro.

Start free trial

14-day free trial. Cancel anytime.

Evidence
ModelledModerate confidence

Modelled from regional ecology — no survey or occurrence data for this water 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
1
Western Green DrakeHatch
2
2
Flav (Small Western Green Drake)Hatch
2
3
2
Mahogany DunHatch
2
2
American March BrownHatch
2
3
2

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Rainbow Trout fly box
MO
Mouse
2-6 · Pattern
Dead-drift, on top
Permits & access
Permit required — see local rules.
  • DUAL GATE: ADF&G sport rules (unbaited single-hook artificial/fly; verify EOs) AND National Park Service Katmai rules including bear-management closures around Brooks Falls
  • Verify both before fishing
  • Extreme bear density — NPS etiquette is mandatory; give bears a very wide berth
  • No trophy framing.
What's coming
Plan ahead
5-day outlook
Other water nearby · 2
American Creek
43 km
Rainbow trout
Naknek River
46 km
Rainbow trout
Gallery · 2
  1. Two brown bears standing in the rushing water below Brooks Falls on the Brooks River, Katmai National Park, Alaska.
    USA - Alaska - Katmai National Park - Brooks Falls
  2. Terrain map of the venue
    Terrain map
The full read · show the working · for Rainbow Trout · confidence 90%
How the 80 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time55 × 13%7.2
Pressure75 × 7%5.3
Insect activity54 × 12%6.5
Conditions total= 80
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout8 June → 31 October
Related guides
Euro Nymphingsubsurface methods
Booking & contacts