Prewett Creek Accesson Missouri River
River flow last 30 days
Stable flows at 3100 cfs
- 01Stable flows at 3100 cfs, creating ideal fishing conditions.
- 02Peak fall hatches of Blue-Winged Olives (BWOs) are providing ample dry fly opportunities, especially on overcast days.
- 03October Caddis are becoming a significant factor, with their larger profile enticing aggressive strikes.
- 04Consistent midge activity is present, offering reliable subsurface nymphing throughout the day.
- 05Callibaetis remain a key player during warmer afternoon hours, providing additional dry fly and emerger chances.
What to tie on at Prewett Creek Access
Picked from recent reports for this stretch.
Sow Bug
Directly mentioned in angler reports, sowbugs are a critical year-round food source in the Missouri River tailwater's weedy sections.
Buy at AmazonTrico Spinner
Peak Trico hatches in August, specifically on tailwaters like the Missouri, targeting Rainbow Trout and Mountain Whitefish looking for small spinners in slower water.
Buy at AmazonFrenchie
A highly effective attractor nymph explicitly recommended in recent angler reports for strong subsurface performance.
Buy at AmazonSan Juan Worm
Explicitly recommended as a lead fly in angler reports, it's a consistent producer in varied spring flows and after runoff.
Buy at AmazonZebra Midge (Black)
Midges are consistently active year-round in this tailwater; this pattern is a staple for enticing finicky trout in spring.
Mother's Day Caddis
The prolific Mother's Day Caddis hatch is strengthening, making this a perfect imitation for adult caddis and triggering aggressive strikes.
Parachute Adams
A versatile general mayfly imitation explicitly mentioned in angler reports, effective for trout rising to various hatches.
Buy at AmazonBlue-Winged Olive Comparadun
BWOs are still hatching, especially on overcast days, making this low-profile dry fly excellent for selective trout feeding on emergers and adults.
Chubby Chernobyl
Excellent large attractor and terrestrial imitation, mimicking hoppers and other insects during peak terrestrial season, drawing aggressive strikes from Rainbow Trout and Mountain Whitefish.
Montana 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.