Spate · Karst Forest · Alaska, US

Prince of Wales Island trout and steelhead streams

Harris river instream restoration structures sept 2022-Tongass-SAJ-012
Tomorrow · A side-water session, not the main event
Intruder
Forecast · Tomorrow
A side-water session, not the main event
A patient day. Fish the cover and stay with it.
75% projected
Today's fly
Intruder
Intruder
Conditions on the water · Tomorrow
Estimate
Level
Moderate rain recently
No gauge reading
Water temp4.6°C
ClarityClear
Weather4°C
WindN 5 km/h
Pressure1027 hPa
Rain · recent23.2 mm
Rain · ahead0.0 mm

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

Water temperature for Cutthroat Trout
Cool — slow
5°C est.ideal 9–15°C
0°14°28°
How to fish it · for Cutthroat 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
Fair — barometric pressure is working for you, but insect activity is the limiting factor today.
Likely species
Hatch timeline · tomorrowPeak at 10h

12h(now) — Black Midge

Stage: On emergersApproach: Emerger or dryActivity: 20%

Peak activity at 10h — Black Midge

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 3 guilds as a supporter.

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Evidence
Records-basedModerate confidence

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

Through the year
0–3 scale · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
1
SalmonflyHatch
2
3
2
Golden StoneHatch
2
3
2
SkwalaHatch
2
3
2
Yellow SallyHatch
2
3
3
2

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

Ranked for today
Fly box · Cutthroat Trout
Permits & access
Permit required — see local rules.
  • Southeast ADF&G rules and stream-specific closures required
  • Land access is not uniform; verify Tongass, Native corporation and private land constraints before waypoints
  • Steelhead is wild-managed and must be handled conservatively.
What's coming
Plan ahead
5-day outlook
Gallery · 2
  1. Harris river instream restoration structures sept 2022-Tongass-SAJ-012
  2. Terrain map of the venue
    Terrain map
The full read · show the working · for Cutthroat Trout · confidence 65%
How the 45 is built — score × weight = contribution
Temperature42 × 28%11.8
Flow41 × 22%9.0
Clarity45 × 18%8.1
Feeding Time50 × 13%6.5
Pressure75 × 7%5.3
Insect activity34 × 12%4.1
Conditions total= 45
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
Warmer water — toward the 9–15 °C ideal band — would lift the temperature score.
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
  • Trout 1 April → 31 October
Related guides
Booking & contacts