Old Steel Bridge (Mainstem)on Flathead River
Conditions right now
No USGS gauge is linked to this water yet, so we can't chart flows.
What's working on Flathead River
- 01Prime fall conditions with clear skies and mild temperatures.
- 02October Caddis are a significant hatch, with fish actively feeding.
- 03Blue-Winged Olives (BWOs) and Mahogany Duns are beginning to appear.
- 04Terrestrials (hoppers, ants, beetles) are still effective along sunny banks.
- 05Focus on slower pools, deeper runs, and current seam edges for optimal success.
- 06Employ dry-dropper rigs early, transition to single dries as hatches intensify.
- 07Use slow, deliberate retrieves for streamers as water cools.
What to tie on at Old Steel Bridge (Mainstem)
Picked from recent reports for this stretch.
Chernobyl Ant
A top terrestrial choice, recommended in recent reports for its effectiveness on Walleye, Perch, Crappie, Whitefish, and other panfish.
Buy at AmazonYellow Sally
Actively hatching, this stonefly imitation is proving excellent for Walleye, Crappie, Whitefish, and Panfish.
Buy at AmazonHopper
With terrestrial activity peaking, this imitation is crucial for Bluegill, Sunfish, Panfish, Walleye, Crappie, and Whitefish looking for a surface meal.
Elk Hair Caddis
A versatile pattern, explicitly mentioned in recent reports and effective for Whitefish, Crappie, Perch, Walleye, and Pike, especially during active caddis hatches.
Buy at AmazonPrince Nymph
A reliable subsurface option, effective year-round for Whitefish, Walleye, Crappie, and Panfish.
Buy at AmazonOctober Caddis (Dry)
Large October Caddis are becoming a significant food source for fish in the Flathead River as fall progresses. Focus your efforts with this pattern, especially in slower seams and eddy lines.
Buy at AmazonBlue-Winged Olive Comparadun
Fall BWO hatches are starting to appear on the Flathead River, and selective fish will key into these emerging adults.
Buy at AmazonMahogany Dun
Mahogany Dun hatches are starting to appear in the fall, offering another key dry fly opportunity on the Flathead River.
Buy at AmazonPheasant Tail Nymph
Mimicking various small mayfly nymphs, this is a consistent producer for Whitefish, Crappie, Perch, and Walleye.
Buy at AmazonMontana season by season
What changes on the water through the year, with the flies for each season.
Fly shops nearby
Local flies, current advice and guided trips.