Western Montana Fly Fishing Report
Regional River Conditions Overview
Western Montana rivers are still elevated across the Bitterroot, Blackfoot, Clark Fork, Rock Creek, and West Fork of the Bitterroot, but several gauges have dropped from last week’s peak. The Bitterroot system is the best bet this week because it offers the most fishable side-channel water, softer banks, protected seams, and practical access. Rock Creek has salmonfly activity moving upstream, but flows remain technical. The Blackfoot and Clark Fork are still big-water programs. Detailed river-by-river reports appear lower on the page.
Bitterroot River
Conditions
Water temp: 48–54°F. The Bitterroot is still high, but it has backed off from the biggest runoff push and is the best overall option in the region. The upper river near Darby is around 2,180 CFS, Bell Crossing is around 4,720 CFS, and the lower river near Missoula is still big. The main current is too heavy in many places, so focus on soft banks, side channels, and inside seams.
Where to Fish
- Side channels with walking-speed current
- Soft inside bends with depth
- Protected bank seams below current breaks
- Back-eddies and slow tailouts near structure
- Foam lines along calm inside banks
- Avoid fast outside bends and heavy mid-river current
How to Fish It
- Start with nymphs or streamers before looking for dries
- Use short, controlled drifts close to the bank
- Fish worms, stonefly nymphs, dark mayfly nymphs, and caddis larva in soft edges
- Use streamers tight to banks when visibility allows
- Switch to dry flies only when fish are clearly rising in calm water
- Float anglers should continue to watch for debris, new wood, and shifting side-channel lines
Top Patterns
- Stonefly nymph, size 6–10
- Worm pattern, red or wine
- Dark mayfly nymph, size 12–16
- Caddis larva or pupa, size 12–16
- BWO emerger, size 16–18
- PMD nymph or emerger, size 14–18
- Olive or black streamer, size 4–6
Blackfoot River
Conditions
Water temp: 50–55°F. The Blackfoot near Bonner is still strong, running around 5,000 CFS. It is lower than last week’s heaviest water, but still pushy enough that wading options are limited. This is mostly a subsurface and streamer program.
Where to Fish
- Lower-river inside corners
- Soft shelves below heavy current
- Back-eddies with depth
- Banks and boulder edges with real current breaks
- Slower tailouts below structure
- Skip fast pocket water that cannot be controlled
How to Fish It
- Use heavy nymph rigs and short drifts
- Fish close to the bank
- Run stonefly nymphs, worms, and heavy attractor nymphs
- Streamer fish slower edges and buckets below structure
- Keep wading conservative and avoid unnecessary crossings
Top Patterns
- Stonefly nymph, size 6–10
- Worm pattern, red or wine
- Heavy attractor nymph
- Dark mayfly nymph, size 12–16
- Caddis larva, size 12–16
- Black or olive streamer, size 4–6
Clark Fork River
Conditions
Water temp: 51–56°F. The Clark Fork is still a big-water fishery this week. The river above Missoula is around 7,370 CFS, and below Missoula it is around 13,900 CFS. The upper river has some softer edge water, but the lower river is still mainly a float-angling and streamer/nymph setup.
Where to Fish
- Soft edges above Missoula
- Protected bank seams below structure
- Backwater areas and side channels
- Slower shelves with depth
- Foam lines along calm inside banks
- Avoid the lower-river main push unless floating with experience
How to Fish It
- Nymph deep in softer edge water
- Fish streamers tight to banks and current breaks
- Use dry-dropper only when fish are feeding in calm edge water
- Avoid broad, fast current where drift control is impossible
- Look for trout tucked where current speed drops sharply
Top Patterns
- Stonefly nymph
- Worm pattern
- Sowbug-style pattern
- Dark mayfly nymph
- Caddis larva or pupa
- BWO or PMD emerger
- Olive or black streamer
Rock Creek
Conditions
Water temp: 47–53°F. Rock Creek near Clinton is around 1,320 CFS and remains technical, but it is more approachable than last week. Salmonfly activity has moved into the upper half of the creek, and golden stones, green drakes, caddis, BWOs, and PMDs are all worth watching. Flows still control where fish can feed and where anglers can wade safely.
Where to Fish
- Upper and middle creek soft banks where salmonflies are active
- Lower-creek soft margins if flows and clarity line up
- Inside bends with slower current
- Boulder edges with refuge water
- Back-eddies and bank pockets
- Avoid unnecessary crossings and fast mid-channel lanes
How to Fish It
- Nymph short through pocket-water edges before committing to dries
- Fish salmonfly dries near protected banks, willows, and soft edges
- Use streamers in softer bank water
- Watch for caddis, BWOs, PMDs, golden stones, green drakes, and salmonflies in softer water
- Wade carefully and fish fewer lanes better
Top Patterns
- Stonefly nymph, size 4–8
- Foam salmonfly dry, size 4–6
- Golden stone dry or nymph, size 6–10
- BWO emerger, size 16–18
- PMD nymph or emerger, size 14–18
- Green drake nymph or dry, size 10–12
- Black or olive streamer, size 4–6
West Fork of the Bitterroot
Conditions
Water temp: 45–51°F. The West Fork near Conner is around 520 CFS, making it the cleanest and most manageable smaller-water option in the Bitterroot system this week. It is still spring water, but compared with the mainstem rivers, it gives anglers a better shot at controlled nymphing and selective dry-fly windows.
Where to Fish
- Soft banks below Painted Rocks through Conner
- Protected tailouts with moderate current
- Inside seams with slower flow
- Edges below wood, boulders, and structure
- Calm seams during afternoon BWO, PMD, and caddis activity
- Avoid fast riffles and pushy mid-channel water
How to Fish It
- Nymph first and stay near the bottom
- Use heavier flies than normal for the West Fork, but scale down if fish get selective
- Fish short, accurate drifts through soft water
- Watch for afternoon caddis, PMD, and BWO activity in protected seams
- Use 5X or 6X when fish are clearly up and eating dries
- Keep wading conservative around pushy slots and fast riffles
Top Patterns
- Stonefly nymph
- Dark mayfly nymph
- Caddis larva or pupa
- BWO emerger, size 16–18
- PMD emerger, size 14–18
- Soft hackle, size 12–16
- Small olive streamer
Planning Note
Cool, wet weather early in the week should help keep runoff pressure down, but warmer breaks can still bump flows. Fish late morning through mid-afternoon, watch the hydrographs, and prioritize water type over river loyalty.
The best plan is to start with the Bitterroot system, stay tight to soft edges, and adjust quickly if flows rise overnight. The West Fork is the cleanest smaller water option, while Rock Creek is the best salmonfly opportunity for experienced wade anglers.
River Flow Snapshot – June 7, 2026
Current gauge values are based on the latest available USGS readings reviewed for this weekly report.
| River | Section | Gauge | Flow (CFS) | Trend / Status |
|---|---|---|---|---|
| Bitterroot | Upper | Near Darby (12344000) | 2,180 | Elevated / Improving |
| Bitterroot | Middle | Bell Crossing nr Victor (12350250) | 4,720 | High / Improving |
| Bitterroot | Lower | Near Missoula (12352500) | 6,690 | High / Big Water |
| Blackfoot | Lower | Near Bonner (12340000) | 5,090 | High / Pushy |
| Clark Fork | Upper | Above Missoula (12340500) | 7,370 | High / Big Water |
| Clark Fork | Lower | Below Missoula (12353000) | 13,900 | Very High / Float Only |
| Rock Creek | Lower | Near Clinton (12334510) | 1,320 | Elevated / Technical |
| West Fork Bitterroot | Lower | Near Conner (12342500) | 520 | Improving / Cleaner Option |
Flows are still elevated across the region, but the overall trend is improving. The best fishing water this week is soft-edge water, side channels, back eddies, and protected seams close to the bank.
Fly Box of the Week
Dry Flies
- Foam salmonfly dry, size 4–6
- Golden stone dry, size 6–10
- Caddis dry, size 12–16
- BWO dun or emerger, size 16–18
- PMD emerger or dry, size 14–18
- Green drake dry, size 10–12
Nymphs
- Stonefly nymph, size 4–10
- Worm pattern, red or wine
- Dark mayfly nymph, size 12–16
- Caddis larva or pupa, size 12–16
- Heavy attractor nymph
- BWO or PMD nymph, size 14–18
Streamers
- Olive streamer, size 4–6
- Black streamer, size 4–6
- Sculpin-style streamer, size 4–6
Hatch and Fly Chart – Early June Runoff Edition
| Hatch / Insect | Activity | Best Time | Recommended Fly | Size |
|---|---|---|---|---|
| Salmonflies | Active on Rock Creek, strongest from middle into upper sections | Midday to afternoon | Foam dry or stonefly nymph | 4–6 |
| Golden Stones | Building behind the salmonflies | Midday to afternoon | Stone dry or nymph | 6–10 |
| Caddis | Active, best in calm edges and evening windows | Afternoon into evening | Dry, pupa, or larva | 12–16 |
| Blue-Winged Olive | Active in softer water and cloudy windows | Late morning to afternoon | Dun or emerger | 16–18 |
| PMD | Building as water temps stabilize in softer water | Late morning to afternoon | Nymph, emerger, or dry | 14–18 |
| Green Drake | Possible on cloudy windows and protected soft water | Afternoon | Nymph, emerger, or dry | 10–12 |
There is good bug activity in the region, but water type still controls the fishing. Hatch activity matters most where trout can actually hold: soft banks, side channels, inside seams, calm tailouts, and protected back-eddies.
Gear Picks of the Week
6-Weight Rod
Elevated flows, heavier nymph rigs, streamers, and larger stonefly dries all favor a 6-weight this week. A 5-weight works in soft water, but the 6-weight gives better control.
Split Shot + Larger Indicators
Depth and drift control still matter more than fly variety. Carry enough weight to get down quickly in short, controlled lanes.
Studded Boots + Wading Staff
Flows are improving but still elevated. Good traction and a wading staff are important for safe, controlled fishing this week.
Strategy and Expectations This Week
This is an improving runoff report with real hatch potential, not a full summer green light. Success this week means finding the slowest useful water, getting flies down quickly, and switching to dries only when fish are actively feeding in protected water.
The Bitterroot system gives anglers the best overall odds, the West Fork is the cleanest smaller-water option, and Rock Creek has the best salmonfly opportunity. A good day this week comes from careful water selection, safe wading, and realistic expectations.
