Fly fishing report · West

Clark Fork River

A Clark Fork River report for Missoula anglers checking below-town flow, freestone tactics, access, heat restrictions, and current Montana rules.

Check flow & weather

Today's river scoreHigh source confidence

Good

Best option: Wade.

Wading is in play only where your chosen access has clear footing, legal entry, and no forced crossings.

Updated Jul 13, 11:17 PM UTCUsually refreshes about every 45 minutes

Recommended approachWade

Mode scores adjust the river-wide score for the risks of wading, bank fishing, or floating.

Wade · Best fit82/100

Wading is in play only where your chosen access has clear footing, legal entry, and no forced crossings.

Bank / edge82/100

Bank and edge fishing remains a practical low-commitment option if access is legal and footing is safe.

Float82/100

A float is in play where this report supports boat access and wind, releases, and shuttle logistics are manageable.

Confirm before you leave

Flow and weather right now.

Use the flow trend to confirm the score before you leave. Weather can change the safest and most productive fishing window.

River strategy

Separate the Missoula reach from the lower river.

This page focuses on the Clark Fork through and below Missoula. The river changes quickly after the Blackfoot, Bitterroot, and Rock Creek influences, so check the right gauge and current restrictions before choosing a reach.

Use the below-Missoula gauge for the main page flow trend and watch tributary clarity.
Fish soft banks, riffles, and side channels instead of heavy middle current during high water.
Summer heat can trigger FWP restrictions, so carry a thermometer and fish early.
The Alberton Gorge is a different whitewater-style plan from casual town wading.

Why this score moved

HeatUse caution

The NWS forecast is near 91F. Fish early and verify water temperature where trout stress is possible.

FlowHelps score

USGS shows 4,690 cfs with a stable over about 6 hours trend. same-date USGS history (1930-2024, 95 readings) puts the normal middle range around 3,330 cfs-7,660 cfs. Flow is inside the same-date normal range, so weather, temperature, and access become the next checks.

SeasonHelps score

Early summer: Runoff drop brings stonefly, caddis, PMD, and streamer opportunities.

Public alertsHelps score

No active NWS alert was returned for this forecast point.

Fishing usefulnessHelps score

Skip or narrow the plan when FWP restrictions are active, tributary color makes the reach unreadable, heat compromises trout handling, or parking and legal river entry are unclear.

Read the water

What changes the plan.

The Clark Fork is best when flows are stable, clarity is improving, and temperatures stay trout-safe. If the river is big, brown, or warm, move to safer edges or a colder nearby water.

Dropping post-runoff

Fish banks, side channels, soft riffles, rubberlegs, and streamers.

Clear summer flow

Use caddis, PMDs, hoppers, ants, and small droppers through riffles and banks.

Rising or stained

Fish edges only if safe and avoid wading pushy crossings.

Warm low water

Check restrictions and switch to early mornings or another river if trout are stressed.

Field plan

Fish it with intention.

Best flows

Use RiverReports and USGS 12353000 below Missoula together. Stable or dropping flow with improving clarity is the better window; big, brown, rising, or warm water should push the plan to softer banks or another river.

When to skip

Skip or narrow the plan when FWP restrictions are active, tributary color makes the reach unreadable, heat compromises trout handling, or parking and legal river entry are unclear.

Local plan

Start by choosing town water, below-town water, or a downstream float. Match flies and safety to that reach instead of applying one Clark Fork plan to the whole drainage.

Backup water

If the Clark Fork is high, dirty, warm, or crowded, compare the Blackfoot for colder freestone water, the Bitterroot for a valley hatch plan, or Rock Creek for a more wade-focused day.

Hatches & flies

Bring a flexible box.

TimingWhat to watchUseful flies

March to AprilSkwalas, March Browns, BWOs, midges, and early stonefly movementSkwala dry, rubberleg, March Brown, BWO emerger, zebra midge

Reviewed family · report says “Skwala dry”Skwala Stonefly PatternsSkwala is an insect and hatch label. Dark olive-brown nymphs and olive adult dries are materially different forms; seasonal timing also varies by watershed.See family guide

Reviewed family · report says “rubberleg”Stonefly Nymph PatternsStonefly nymph patterns generally emphasize two tails, a broad thorax, segmented abdomen, and bottom contact; rubber legs, biots, beads, and jig hooks define different exact forms.See family guide + 3 more reviewed guides in the Fly Box

May to JuneRunoff edges, salmonflies, golden stones, caddis, PMDsChubby Chernobyl, Pat's rubber legs, caddis pupa, PMD emerger, streamer

Reviewed pattern · report says “Chubby Chernobyl”Chubby ChernobylIdentify the construction, not the color: a long foam overbody over a segmented dubbed underside, rubber legs at two tie-in stations, two distinct buoyant synthetic-yarn wing sections, and a short flash tail. The paired wing stations and layered foam-and-dubbing body separate the reviewed Chubby from the original Chernobyl Ant and from generic foam hoppers or beetles.See photos & how to fish it

Reviewed pattern · report says “Pat's rubber legs”Pat's Rubber LegsA weighted long-shank nymph, variegated chenille body, two tails, and multiple pairs of long rubber legs identify the core form. Generic rubber-leg stoneflies remain a broader family, not automatic Pat's Rubber Legs matches.See photos & how to fish it + 3 more reviewed guides in the Fly Box

July to AugustHoppers, ants, beetles, nocturnal stones, spruce moths where presentHopper-dropper, foam ant, beetle, nocturnal stone, small perdigon

Reviewed family · report says “foam ant”Ant PatternsAnt patterns can be foam, fur-bodied, winged, or sunken. The narrow waist and paired body lobes matter more than one material recipe.See family guide

Reviewed family · report says “beetle”Beetle PatternsBeetle flies range from simple foam shells to hair-bodied and sunken forms. A rounded back and compact profile distinguish the family from ants and hoppers.See family guide + 2 more reviewed guides in the Fly Box

September to OctoberMahoganies, BWOs, October caddis, baitfish, fall streamer windowsMahogany, BWO, October caddis, sculpin, leech

Reviewed family · report says “Mahogany”Isonychia and Mahogany Dun PatternsIsonychia nymphs are active swimmers; emergers, parachute or other dry forms, and spinners occupy different levels. Mahogany Dun can be regional hatch wording, so it does not identify one exact fly recipe.See family guide

Reviewed family · report says “BWO”Blue-Winged Olive PatternsBWO describes a hatch group, not one fly. Nymph, emerger, dry, cripple, and spinner profiles must stay separate because they occupy different parts of the water column.See family guide + 3 more reviewed guides in the Fly Box

Pick a reach first: town, below-town, or downstream float water each fishes differently.

Fish inside bends and soft bank seams before stepping into heavy current.

Use dry-droppers on broken riffles and single dries when pods feed in slicks.

Streamer fish clouds, stain, and deeper bank lines with a controlled swing or strip.

Give other anglers, boats, and town users room around popular bridges and access points.

Access & responsibility

Know the entry. Know the exit.

Montana FWP regulations and current restrictions control trout, pike, harvest, methods, closures, and temperature-related limits. Check the current rules for the exact reach.

Missoula town reach

Good for quick access, but still requires current, temperature, and courtesy checks.

Below Missoula gauge reach

Primary page flow context after major tributary influence.

Alberton corridor

More float- and safety-focused; do not treat it like simple wade water.

Transparent sources

Check the facts behind the plan.

Last material review: 2026-05-31

flowRiverReports Clark Fork River below Missoula flowUSGS Clark Fork below Missoula 12353000 regulationMontana FWP fishing regulations accessMontana stream access law safetyMontana FWP current waterbody closures and restrictions safetyNational Weather Service forecast point

Common questions

Before you leave.

What should I check first before fishing the Clark Fork River?+

Check the below-Missoula gauge, clarity, FWP current restrictions, weather, and your exact access point.

Are there special regulations on the Clark Fork River?+

Yes. The Clark Fork has reach-specific rules and current restrictions can change during heat, fire, or emergency events.

What flies should I bring for the Clark Fork River?+

Bring the hatch-chart flies, a few confidence nymphs, and a streamer box. Then adjust for water temperature, clarity, and the insects you actually see.

Can I wade the Clark Fork River?+

Yes around some public access, but the river is large and pushy. Use official access and avoid crossing private land.

When should I skip the Clark Fork River?+

Skip it when flows are unsafe, temperatures stress trout, wildfire or emergency closures are active, or legal access for the reach is not clear.