Fall Fishing Near Bozeman, Montana: Why We Love This Time of Year

A Guide’s Look at Fall Fly Fishing Near Bozeman, Montana

By the time September rolls around, most of us guides have spent a long summer in the boat. We have had plenty of hot days, early alarms, busy boat ramps, and mornings spent trying to get on the water ahead of the heat. Fall brings a pretty welcome change of pace.

The mornings start getting cooler, waders come back out of the closet, and we can usually slow things down a little bit. Instead of trying to launch at daylight to beat afternoon temperatures, fall often gives us the opportunity for a later start, another cup of coffee, and a more relaxed day on the river.

The fishing changes too. Trout that have spent much of the summer dealing with warm afternoons, low water, and a lot of fishing pressure can start becoming more aggressive as temperatures cool. Terrestrials can still be very much in play during September, Blue-Winged Olives begin becoming more important, and streamer fishing starts getting more interesting as we move deeper into fall.

It is also simply a beautiful time to be in Montana. Cottonwoods and aspens start changing, the mountains can get their first dusting of snow, and tourism traffic around Bozeman begins slowing down after a busy summer.

For a lot of us, September and October are some of the months we look forward to most.

What Fall Fishing Around Bozeman Looks Like

Fall fly fishing around Bozeman is less about one specific hatch and more about having a lot of different options.

Early September can still feel a lot like late summer. Hoppers, ants, beetles, and smaller attractor dries can continue producing fish, especially during warmer afternoons. At the same time, cooler mornings and cloudy weather start bringing more mayfly activity back into the picture.

As September progresses into October, we generally start paying more attention to Blue-Winged Olives, smaller mayflies, nymphs, and streamers.

One of the nice things about fishing this time of year is that we don't necessarily have to commit to one technique all day. A morning might start with a nymph rig or streamer, transition into a small BWO hatch around midday, and finish with terrestrials or another round of streamer fishing in the afternoon.

Conditions dictate the day, and that is part of what makes fall fishing fun.

Upper Madison River

The Upper Madison is one of our favorite fall options.

Cooler temperatures can bring some larger brown trout back into the conversation as fish begin moving around and becoming more aggressive heading toward the fall spawning season. This can make streamer fishing particularly interesting, especially on cloudy days.

September can still offer really good terrestrial fishing with ants, beetles, smaller hoppers, and attractor dry flies. As the weather continues cooling, BWOs and smaller mayflies become increasingly important.

The Upper Madison also gives us plenty of options depending on the day. We can cover water from the boat, fish dry-dropper rigs through riffles and buckets, or slow down and work particular areas more thoroughly.

[Read the Latest Upper Madison River Fishing Report →]

Gallatin River

Fall is also a great time to get back on the Gallatin.

The Gallatin can receive a lot of fishing pressure during the height of summer, particularly in the canyon and around the easier access points. Once September arrives and visitor traffic begins slowing down, it can feel like a different river.

Cool mornings and afternoons make walk-wade fishing much more comfortable, and lower fall flows can open up water that was difficult to fish earlier in the season.

Ants, beetles, small attractor dries, BWOs, and dry-dropper setups are all worth having available. As we move toward October, nymph fishing and small mayfly patterns become increasingly important.

It can be a really enjoyable river to spend a fall day moving slowly, fishing pockets, riffles, and deeper runs without feeling like you need to race from spot to spot.

[Read the Latest Gallatin River Fishing Report →]

Yellowstone River

There may not be many better places to spend a fall day than the Yellowstone River.

By September, the busy summer season in Paradise Valley begins slowing down, and cooler weather starts changing the personality of the river.

Terrestrial fishing can continue well into September, especially when warm afternoons and a little wind put hoppers, ants, and beetles in the water. Cooler cloudy days can bring BWOs into play, while streamer fishing becomes increasingly interesting as fall progresses.

The Yellowstone is also a big river with a lot of room to explore. Fall gives us the opportunity to cover water, fish bigger runs and banks, and sometimes revisit stretches that may have felt crowded earlier in the summer.

It is still important to keep an eye on weather and water clarity. Heavy rain or weather in Yellowstone National Park and the Lamar drainage can occasionally affect clarity downstream, even during the fall.

[Read the Latest Yellowstone River Fishing Report →]

Lower Madison River

After spending much of the summer keeping a close eye on water temperatures, fall can be a welcome return to the Lower Madison.

Cooler nights and shorter days help bring water temperatures back down, and fishing windows can become much more comfortable than they were during July and August.

The Lower Madison is a great option for shorter days, half-day trips, and fishing close to Bozeman. Dry-dropper rigs, smaller mayfly nymphs, crayfish patterns, terrestrials, and streamers can all have their place depending on conditions.

Fall can also mean considerably less recreational traffic on the Lower Madison. The tubes and summer crowds begin disappearing, which allows us to spend more time fishing water that can be difficult to comfortably fish during the busiest part of the summer.

[Read the Latest Lower Madison River Fishing Report →]

Fall Flies and Tactics

One of the best things about fall is that there usually isn't only one way to catch fish.

September can still produce really good terrestrial fishing. Smaller hoppers, ants, beetles, and attractor dries are always worth keeping around. As temperatures cool, BWOs start becoming a bigger part of the conversation, particularly during cloudy weather and around late morning or midday.

Dry-dropper fishing remains one of our favorite ways to cover water. Smaller perdigons, mayfly nymphs, pheasant tails, lightning bugs, and similar patterns can all be effective underneath an attractor dry.

As we move farther into October, we tend to downsize some of our flies and pay more attention to the small bugs.

You don't necessarily need an enormous fly box for fall fishing. Having a good selection of terrestrials, BWOs, attractor dries, smaller nymphs, and a few streamers will cover a lot of situations around Bozeman.

[Read Our Complete Guide to Fall Flies and Fishing Tactics →]

Fall Streamer Fishing

Streamer fishing is one of the biggest reasons many anglers and guides look forward to fall.

Cooling water and shorter days can make trout more willing to move for a larger meal. Brown trout also become more active as we approach their spawning season, which can create opportunities for some of the larger fish in our rivers.

That does not mean every fall day is going to be nonstop streamer fishing.

Some days they want a big articulated fly. Other days a smaller sculpin or leech pattern is much more productive. Cloud cover, water temperature, clarity, and the mood of the fish all play a role.

Streamer fishing can also be a great way to cover water. Instead of spending the entire day staring at an indicator, we can work banks, structure, deeper buckets, and likely holding water while looking for an aggressive fish.

For anglers who enjoy actively fishing and seeing a trout chase down a fly, it is a pretty hard way to beat spending a fall day.

[Read Our Fall Streamer Fishing Guide →]

What Weather Should You Expect?

If there is one thing you should expect from fall weather in Montana, it is that you should probably expect everything.

Early September can still feel like summer. We can have beautiful sunny afternoons with temperatures reaching into the 70s. The difference is that mornings are generally much cooler and the days are getting shorter.

A few weeks later, things can look completely different.

Cold rain, wind, freezing mornings, and even snow are all possible by late September and October. It is not unusual to start a day bundled up and finish the afternoon fishing comfortably in lighter layers.

Those weather changes are not necessarily bad for fishing either. Some of our favorite fall days happen when the weather looks a little less inviting.

Clouds, light rain, and dropping temperatures can bring BWOs out and make trout more comfortable moving for streamers.

The important part is being prepared.

What Anglers Should Bring

Layers are probably the most important thing you can bring on a fall fishing trip.

If you can travel with waders and wading boots, they are a great piece of gear to have in the fall. If you don’t have waders or don’t want to pack them for traveling, there are multiple fly shops in the are that rent waders and wading boots.

Even when the afternoon forecast looks warm, mornings on the river can be cold.

A good fall setup might include a lightweight base layer, fleece or insulated layer, rain jacket, warm socks, hat, sunglasses, and another jacket that you can add or remove throughout the day.

On colder days, gloves and a warm hat can make a big difference.

A waterproof rain jacket is something we recommend bringing regardless of what the forecast says. Montana weather can change quickly, particularly as we get farther into September and October.

If you are traveling to Bozeman for a fishing trip, take a look at the forecast before you leave — but don't pack exclusively for that forecast. Having a few extra layers in your bag is rarely something you will regret.

Fishing Pressure and Fall Crowds

One of our favorite things about fall is simply having a little more room.

Bozeman and Southwest Montana have gotten busy during the summer, and our rivers certainly aren't a secret anymore. July and August can mean busy boat ramps, recreational traffic, and a lot of anglers on the most popular stretches.

September begins changing that.

Families head home for school, summer vacations wind down, and tourism traffic starts slowing. By October, things can feel considerably quieter.

That gives us an opportunity to revisit certain stretches of river that we might intentionally avoid during the busiest weeks of summer.

It doesn't mean you'll have every river completely to yourself, but there is generally more room to spread out.

That is a pretty nice change after a long summer.

Is Fall a Good Time to Plan a Montana Fly Fishing Trip?

Absolutely.

September is a great month for anglers who want a combination of comfortable weather, terrestrial fishing, mayfly activity, and the beginning of fall streamer season.

October is a little less predictable, but that is also part of what makes it fun. You may get a beautiful 65-degree afternoon surrounded by changing cottonwoods, or you may be fishing BWOs in a snowstorm.

Sometimes you get both in the same week.

Fall also lets us slow down.

We aren't necessarily trying to launch at first light to beat hot afternoon water temperatures. There is often less traffic on the rivers, fishing pressure starts declining, and trout begin settling into their fall routines.

After a long Montana summer, those cooler mornings feel pretty good.

We get to put the waders back on, drink another cup of coffee before heading to the river, and see what the day gives us.

For a lot of Montana guides, that's exactly why fall is one of our favorite times of year to fish.

Thinking About Booking a Fall Montana Fly Fishing Trip?

Fall is a great time to plan a fly fishing trip to Montana, whether you are coming out for the first time or have fished here before. With cooler weather, fewer crowds, and plenty of different fishing options around Bozeman, September and October can be some of the most enjoyable weeks of the year to be on the water. If you are thinking about putting together a fall trip, we would love to help you iron out the details, talk through current conditions and river options, and get you on the water for a great day of fishing.