Montana ·
Missouri River Fly Fishing Report - June 7, 2026
MISSOURI RIVER
ReportJUN 8 — 15, 2026
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Flow
3230CFS
Missouri River bl Holter Dam nr Wolf Cr MT
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Water Temp
56.7°F
Updated 2026-06-07
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Weather
33–64°F
Mostly Clear
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Clarity
Clear
Check post-storm
The Missouri below Holter Dam is running 3,230 cfs at 56.7°F — right in the trout's prime metabolic zone — with a slight green tint from Dearborn River inflow adding character downstream. PMD blanket hatches have been explosive and caddis have arrived in force, setting up some of the finest dry-fly fishing of the year.
What's Working — Hot Flies
Tungsten Split Case Nymph - PMD #20
#20
Roza's World Spain Perdigon Barbless #18 - 32
#18
Blowtorch - Hare's Ear #12
#12
Tungsten Tailwater Sowbug - Rainbow #10
#10
Joe's Mini Crayfish Jig #6
#6
Corn-fed Caddis (CDC) Tan #20
#20
Corn-fed Caddis (CDC) Olive #20
#20
Parachute - Blue Wing Olive #22
#22
Egan's Thread Frenchie Jig - Olive #12
#12
Black Zebra Midge(TBH) #20
#20
Egan's Silver Bullet - Baetis #14
#14
Coffey's CH Sparkle Minnow Sculpin #6
#6
Hatch Chart
| Insect | Size | Activity | Prime Time |
|---|---|---|---|
| Pale Morning Dun (PMD) | #16–20 | 🔥 Blanket Hatch — Peak | Late Morning – Afternoon (10am–3pm) |
| Caddis (Brachycentrus / Hydropsyche) | #16–20 | 🔥 Active & Building | Afternoon – Evening (2pm–Dusk) |
| Blue-Winged Olive (Baetis) | #18–22 | ⚡ Sporadic / Overcast Triggered | Overcast Mornings & Evening |
| Midge | #20–22 | ⚡ Consistent Subsurface | Early Morning & Evening Slicks |
| Sowbug / Scud (Aquatic Crustacean) | #10–16 | ⚡ Steady All Day | All Day — Especially Morning Nymphing |
| Crayfish | #6 | 🔥 Active as Water Warms | Midday – Afternoon (warmer water temps) |
Best Time Window
- Monday 9:00 AM – 3:00 PM: Cold overnight (33°F) will delay the PMD hatch slightly but concentrate it — mostly sunny skies and SSW winds 7–13 mph make for ideal dry-fly conditions once the hatch fires mid-morning.
- Monday 4:00 PM – Dusk: Caddis evening window is building — expect swarms of caddis adults in the canyon as temps peak near 64°F; swung pupa and CDC caddis dries in the riffles.
- Tuesday Morning (Pre-Storm): Fish hard before noon Tuesday — afternoon thunderstorms (50% chance) will blow out the hatch, but the pre-front pressure drop often triggers aggressive feeding; nymph the deeper runs with crayfish and Frenchies.
Guide's Tip
From the benchRight now the Mo is fishing in two distinct acts: nymph the mornings hard with a short-leash setup (indicator 2–3 ft above the fly) using a Frenchie or Perdigon anchored by a Sowbug or Crayfish Jig, then be ready to switch to dries the moment you see the first PMD spinners in the air around 10am. These fish have seen a lot of flies — long leaders (12–15 ft), fine tippet (6X for dries), and a fly-first presentation are non-negotiable. With tonight's forecast dropping to 33°F, expect a slower morning start Monday, but that cold night should push the PMD hatch later and more concentrated — be on the water by 9am and stay through the afternoon spinner fall.
Main Species
Brown Trout
Rainbow Trout
Mountain Whitefish
