Clark Fork River
river in Montana
The Clark Fork, particularly below Missoula, provides significant fly fishing opportunities. While sometimes overlooked, it offers consistent action for robust rainbow and brown trout, with some westslope cutthroats, and can be productively fished by boat or wading.
Conditions right now
No USGS gauge is linked to this water yet, so we can't chart flows.
October Caddis are actively hatching
- 01October Caddis are actively hatching, offering significant dry fly action.
- 02Blue-Winged Olives (BWOs) are beginning their fall emergence, particularly on overcast afternoons.
- 03Mahogany Duns are also making a crucial fall appearance.
- 04Terrestrial patterns like Hoppers and Chernobyl Ants can still be effective for opportunistic feeders.
- 05Subsurface nymphing with patterns like the Flashback Pheasant Tail and streamer fishing with Pine Squirrel Leeches will be productive as water cools.
Past reports week by week
8 weeksWhat to tie on
Picked from reports, hatches and the season. Tap a fly for the recipe and where else it works.
Blue-Winged Olive (BWO) Comparadun
Blue-Winged Olives are beginning their prolific fall hatches, and the low-profile Comparadun is excellent for selective trout feeding on emergers and adults in softer water.
Buy at AmazonHopper
Terrestrial activity, particularly with grasshoppers, remains strong along the banks, making this an effective attractor for opportunistic feeders looking for a substantial meal.
Chernobyl Ant
Larger terrestrial patterns like the Chernobyl Ant continue to entice aggressive strikes, especially for cutthroat and opportunistic trout seeking substantial surface food.
Buy at AmazonPurple Haze fly
This versatile attractor dry fly continues to be effective in fall, especially when fish are looking up and no specific hatch is obvious.
Mahogany Dun
Mahogany Duns are starting to hatch, offering another excellent dry fly opportunity for opportunistic trout.
Buy at AmazonOctober Caddis
October Caddis are actively hatching across the region in early fall, and fish are keying into these large, visible dry flies.
Flashback Pheasant Tail Nymph
As fall progresses and subsurface feeding becomes more prevalent, this versatile nymph effectively mimics active mayfly nymphs, including emerging BWOs.
Pine Squirrel Leech
As water temperatures cool, larger trout become more aggressive towards baitfish and leeches. This pattern provides realistic movement even on a slow retrieve.
Buy at AmazonWhere to fish and who to ask
Kelly Island
Popular area near Missoula for boat launches and wade fishing.
Milltown State Park
Offers historical context and fishing access below the former dam site.
St. Regis Fishing Access
Provides good access to the lower river with varied water types.
Fly shops within 40 miles
Montana Trout Outfitters
Grizzly Hackle Fly Shop
Freestone Fly Shop
Kingfisher Fly Shop
Get Clark Fork River reports by email
Save this water and we'll email you a weekly summary of conditions, hatches and what's working.
Montana season by season
What changes on the water through the year, with the flies for each season.
Read before you go
Winter Fly Fishing: Essential Cold Weather Tips & Tactics
Master winter fly fishing with proven cold weather strategies, gear selection, and tactics for catching trout when temperatures drop.
Fly Line Types Guide: WF, DT, Running & Shooting Heads
Master fly line selection with our comprehensive guide to weight forward, double taper, running lines, and shooting heads for every fishing situation.
Best Fly Fishing Waders of 2025 – Breathable vs. Neoprene
Expert comparison of breathable and neoprene waders with top 2025 models for every budget and fishing condition.
Felt vs. Rubber Sole Wading Boots: What's Legal Where
Essential guide to felt vs. rubber sole wading boots, plus state-by-state regulations to keep you legal on the water.
Fly Fishing Pack vs Vest: Which Setup Is Right for You?
Compare fly fishing packs and vests to find the perfect gear setup for your angling style and fishing conditions.
Best Fly Fishing Sunglasses: Lens Color & Polarization Guide
Master lens color selection and polarization technology for superior vision and fish detection on the water.
Quick answers
Common questions about Clark Fork River.
What flies work best on Clark Fork River?
Our top scored fly patterns for Clark Fork River right now are Yellow Sally (80% confidence), Blue-Winged Olive (BWO) Comparadun (80% confidence), Hopper (80% confidence). These picks are scored from recent fishing reports, hatch data, and seasonal patterns.
What fish species are in Clark Fork River?
Clark Fork River holds Rainbow Trout, Brown Trout, Westslope Cutthroat Trout. See the species links on this page for fly recommendations and seasonal behavior for each.
What are current flow conditions on Clark Fork River?
Live USGS streamflow readings for Clark Fork River are charted in the sidebar of this page and updated automatically from the nearest gauge.
Is Clark Fork River fishing well right now?
We publish a fresh bite report for Clark Fork River each week based on recent on-the-water intel. The current report — with conditions, hatches, and what's producing — is on this page.