Freestone · Mixed · Montana, US

Blackfoot River

A raft with three anglers floats the Blackfoot River past a rock cliff and pine forest near Missoula, Montana.

The Blackfoot is the river Norman Maclean made everybody want to fish, and the remarkable thing is that after a century of mining abuse it came back.

Today · Slow going — pick your moments
Mahogany Sparkle Dun
Forecast · Today
Slow going — pick your moments
Slow going — pick your moments and do not force it.
45% projected
Today's fly
Mahogany Sparkle Dun
Mahogany Sparkle Dun
Conditions on the water · Today
Live gauge
Level
Rising
0.65 m
Lifting fast
Water temp12.4°C
ClarityVery coloured
Weather15°C
WindN 4 km/h
Pressure1008 hPa
Rain · recent0.0 mm
Rain · ahead1.3 mm

The nearest gauge doesn't record temperatures, so we've estimated it — defer to the river keeper's advice.

Water temperature for Brown Trout
Ideal
12°C est.ideal 1016°C
0°14°28°
How to fish it · for Brown 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.
Likely species
Hatch timeline · todayPeak at 12pm

12pm(now) Mahogany Dun

Stage: On emergersApproach: Emerger or dryActivity: 75%
Also:Reed Smut30%
Peak emergence windowDegree-days at peak6 food groups active

Peak activity at 12pm — Mahogany Dun (Mahogany Dun, Peak emergence window)

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

Top prey shown — see all 3 with Pro.

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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
2
1
1
2
2
2
2
2
2
2
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
Brown Trout fly box
SD
Sex Dungeon
2-6 · Pattern
Proven pattern for this period
Permits & access
Permit required — see local rules.
  • Montana licence
  • Bull trout are strictly protected — do not target, release any incidental catch unharmed
  • Honour the native-species catch-and-release reaches.
What's coming
Plan ahead
5-day outlook
Other water nearby · 2
Gallery · 2
  1. A raft with three anglers floats the Blackfoot River past a rock cliff and pine forest near Missoula, Montana.
    Blackfoot River in Missoula, Montana
  2. Terrain map of the venue
    Terrain map
About this water

The Blackfoot is the river Norman Maclean made everybody want to fish, and the remarkable thing is that after a century of mining abuse it came back. Westslope cutthroat and rainbows hold in the canyon pocket water and the long valley runs, and there are bull trout you must never target — they're protected, and the fishery's recovery rides on them. It's a wade-and-float freestone that fishes best from July on, once the runoff has come and gone. Big country, big sky, and a fish or two that feels like a small redemption.

  • Mixed
Water quality · US Clean Water Act
  • Aquatic lifeImpaired
What this classification means

EPA ATTAINS assessment unit 'Blackfoot River' (MT76F001_031), 2021 Integrated Report. Aquatic Life use: Not Supporting. Listed impairment causes: Temperature, Sediment, Nutrients. This is a Clean Water Act assessment-unit classification (the US analogue of WFD), not a live reading.

Status is for the Clean Water Act assessment unit covering this reach.

EPA ATTAINS (Clean Water Act) · MT76F001_031

The full read · show the working · for Brown Trout · confidence 90%
How the 84 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time60 × 13%7.8
Pressure80 × 7%5.6
Insect activity62 × 12%7.4
Conditions total= 84
Can you trust it?
Water temperaturelive gauge readinggauge
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
Seasons & zones
  • Trout Third Saturday of MayLast day of February
Related guides
Booking & contacts