Cool weather eventually finds its way to Montana by late August, setting the stage for much-improved fall fishing on the Missouri River in September. Summer crowds disperse and recreational floaters disappear following Labor Day weekend.
Cloudy days bring a return of mayflies, and cooling water keeps trout active throughout the day. Hoppers fished tight to rip-rap lined banks get rewarded with aggressive strikes and fierce runs by hard-fighting rainbow and brown trout.
Floating grass continues to present challenges through September, diminishing with increasing flows in late September and October.
September Hatches on the Missouri River
BWO and Pseudocleon mayflies start to show themselves along with the cooling water and air temperatures. Mild, cloudy days are ideal for fishing these early fall hatches. Look for subtle rises along current seams.
Hoppers, ants, and beetles can bring quality fish to the surface throughout the day.
Nymph fishing continues to frustrate many anglers as the grass starts to break loose from the streambed. Experienced sticks can deal with this inconvenience, but it can be frustrating for novices. The upper river between Holter Dam and Craig is the best section of the river to get away from the floating grass mats.
Hatches improve throughout September, and rising fish can generally be found most days. Clouds and evening shadows trigger mayfly hatches that bring fish to the surface. Trout move into shallow runs during the emergences and can be found throughout riffles, runs, and back eddies. Standard Missouri River dry fly rigs in September involve long leaders with fine tippets and small flies.
Streamer fishing comes back into play as the grass recedes, and aggressive strikes from trophy brown trout become more and more common as Autumn settles in. Floating grass continues to be a problem, but it generally improves late in the month. This is a great time of the year to target the water between the Pelican Point and Cascade.
The arrival of Autumn reinvigorates the rivers and trout throughout the region. Fishing in Montana improves with cooling water temperatures and reduced irrigation demands on our rivers.
The best Montana fly fishing in September remains centered around Bozeman, and our guided trips focus on these diverse fisheries through the fall. If weather and water conditions are favorable, our guides will consider heading to the Missouri River for a day or two of fly fishing near Craig on multi-day bookings upon request.
With over two decades of outfitting Montana fly fishing trips, you can rely on the expert guides at Fins and Feathers to pick the best waters for a September trip. If a Missouri River fly fishing trip in September is on your list, contact us to see if we can include that in a custom trip itinerary.
Guided fly fishing trips with Fins and Feathers can be secured online, via e-mail, or by calling us at 1-406-468-5019.