Freestone · Mixed · Alaska, US

Brooks River (Katmai)

Two brown bears standing in the rushing water below Brooks Falls on the Brooks River, Katmai National Park, Alaska.

Brooks River is famous the world over for the wrong reason, as far as an angler's concerned — it's the river where the brown bears line up at the falls to catch leaping sockeye, and that spectacle defines everything about fishing it.

Prime · Rainbow Trout
Flesh Fly · 2-6
Primelive now
About as good as it gets
River high but settled. Coloured water — fish bigger and deeper, confident takes down the seams.
90% confidence
What moved it
  • LevelProxyvia Kvichak River (Iliamna outlet)
  • Water temp11.5°C
  • ClarityClear
Today's fly
Flesh Fly
Flesh Fly2-6
Swing, sub-surface
Conditions on the water
Proxy gauge
Level
Steady
Proxy
via Kvichak River (Iliamna outlet)
Water temp11.5°C
ClarityClear
Weather9°C
WindW 3 km/h
Pressure1012 hPa
Rain · recent2.4 mm
Rain · ahead0.0 mm

No gauge on this water — conditions are inferred from Kvichak River (Iliamna outlet). The trend transfers, the absolute level does not.

Water temperature for Rainbow Trout
Ideal
12°C est.ideal 1018°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 time of day could be better.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 6 active hatches hour by hour with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 2 guilds with Pro.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

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Evidence
Records-basedModerate confidence

Based on species-occurrence records, not local invertebrate surveys.

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
1
Brown DunHatch
2
3
3
3
3
3
3
2
Western Green DrakeHatch
2
2
Flav (Small Western Green Drake)Hatch
2
3
2
Mahogany DunHatch
2
2

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

Ranked for today
Rainbow Trout fly box
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
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
About this water

Brooks River is famous the world over for the wrong reason, as far as an angler's concerned — it's the river where the brown bears line up at the falls to catch leaping sockeye, and that spectacle defines everything about fishing it. It's a tiny river, barely a mile and a half between two big Katmai lakes, lake-buffered and gin-stable, holding strong wild rainbows and Dolly Varden that feed on the immense sockeye run and its eggs. But this is a National Park first and a fishery second: the Park Service closes water and reroutes people around the bears, the place is busy in the salmon weeks, and the etiquette and rules are strict and strictly enforced. Fish it for the experience and the rainbows in the shoulders of the season, give the bears a very wide berth, and treat the NPS regulations as the hard gate they are. Not a place for trophy ambition — a place for humility.

  • Mixed
The full read · show the working · for Rainbow Trout · confidence 90%
How the 81 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time60 × 13%7.8
Pressure75 × 7%5.3
Insect activity61 × 12%7.3
Conditions total= 81
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Kvichak River (Iliamna outlet)proxy
Prey activitymodelled from regional profilemodelled
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
  • Trout 8 June31 October
Related guides
Booking & contacts