20 Best Trout Flies for October 2026

Updated for October 2026: October brings some of the best fall trout fishing of the year. Cooler water, changing hatches, spawning activity, and aggressive pre-winter feeding can all influence what trout eat. This guide has been refreshed for 2026 with fly patterns that cover the most important October food sources, including mayflies, caddis, midges, eggs, nymphs, and streamers.

October is one of my favorite months to fish for trout. The summer crowds start to thin out, water temperatures drop, and trout know winter isn't far away. But fall fishing can also change quickly.

One day you might find fish looking up during a Blue-Winged Olive hatch. The next day they're glued to the bottom and won't move more than a few inches for a fly. Brown trout are also becoming more aggressive as spawning season approaches, which can make October a great time to throw streamers. That's why I don't head out in October with one type of fly.

I want a mix of nymphs, dries, emergers, egg patterns, and streamers so I can adjust to what the trout are actually doing instead of forcing one technique all day.

Below are 20 flies I'd want in my box for October and when I'd consider fishing each one.

Nymph Flies for October

If you're not seeing fish rise, start underneath. Cooling fall water often pushes more of the action below the surface, and trout may hold deeper in runs, seams, pockets, and slower water where they don't have to burn as much energy.

The key isn't simply getting your fly as deep as possible. It's getting it into the trout's feeding lane with a natural drift.

As fall progresses, this can also be a good time to increase fly size and adjust your depth. Our guide to fall nymph fly fishing breaks down when to fish larger nymphs, where trout hold, and how to adjust your rig for colder water.

If you want a ready-to-fish selection for this kind of water, the Guide Nymphs Fly Fishing Flies Kit includes 120 nymphs covering the patterns I reach for across changing fall conditions.

1. Flashback Pheasant Tail

The Flashback Pheasant Tail is a solid choice when mayfly nymphs are active and trout are feeding below the surface. The flashy wing case gives the pattern a little extra visibility without making it look unnatural. Fish it through seams, riffles, and deeper runs, either on its own or behind a heavier nymph.

2. Hare’s Ear

The Hare’s Ear is one of those flies that works in a lot of different situations because it looks like a little bit of everything. Its buggy profile can suggest mayfly nymphs, caddis larvae, or other aquatic insects. In October, I like it in slower seams, pockets, and deeper runs where trout are feeding close to the bottom.

3. Glo Bug Red Dot

Egg patterns can become especially effective in fall as brown trout begin spawning and loose eggs enter the current. Rainbows and other trout may feed on those eggs downstream. Focus on feeding fish below spawning areas, and avoid casting directly over actively spawning trout or walking through visible spawning beds.

4. Copper John

The Copper John is a great pattern when you need to get down quickly. Its weight helps it reach deeper holding water, while the flashy body gives trout something easy to notice. I like it as a lead fly in deeper runs and pockets, especially when paired with a smaller mayfly or midge pattern behind it.

5. Mercury Midge

The Mercury Midge is a simple pattern, but that’s part of what makes it so effective. Its slim profile works well when trout are keyed in on small midges, especially in slower seams, tailwaters, and deeper runs. Fish it behind a heavier nymph when you need to get a small fly down into the feeding zone.

6. Hot Wire Prince

The Hot Wire Prince is a great attractor nymph when you want something with a little more weight and visibility. Its segmented body and buggy profile can suggest several different aquatic insects without perfectly matching any one of them. In October, I like it in deeper runs and faster pockets where getting your flies down quickly is more important than matching a specific hatch.

7. Holy Grail

The Holy Grail is a versatile pattern that can imitate a caddis pupa, mayfly nymph, or emerging insect. It works especially well when trout are feeding just off the bottom or beginning to move higher in the water column. Try it on a dead drift first, then let it swing at the end of the drift before recasting.

Dry Flies & Emergers for October

Don't pack away the dry flies just because summer is over.

October can still produce excellent surface activity when the conditions line up. Blue-Winged Olives, midges, late-season caddis, and other small insects can bring trout up, especially during warmer parts of the day or when cloudy weather triggers a hatch.

Watch the water before automatically tying on a dry. If you're seeing consistent rises, bugs coming off, or trout feeding just under the surface, that's your signal to switch.

Emergers can be especially effective when trout are feeding in or just below the surface film and ignoring fully developed adults.

8. Trico Dun

Tricos can still show up in October, but how important they are depends heavily on location, elevation, and weather. On warmer fall mornings, you may still find trout sipping small mayflies on the surface. If you see consistent rises to tiny bugs, a Trico Dun can be a good match. If you don’t see surface activity, don’t force it.

9. Parachute Adams

The Parachute Adams is one of my go-to dries when trout are rising but I’m not completely sure what they’re eating. Its general mayfly profile can cover a lot of situations, and the white post makes it easy to track on the water. In October, try it during BWO activity or anytime you’re seeing steady rises to small mayflies.

10. Hot Wing Caddis

Late-season caddis activity can still bring trout to the surface in October, especially during warmer afternoons. The Hot Wing Caddis gives you a visible dry fly with a realistic profile that works well in riffles, seams, and pocket water. Watch for fluttering adults or splashy rises before tying one on.

11. Last Chance Cripple

The Last Chance Cripple is designed to imitate a mayfly struggling to emerge through the surface film. That vulnerable position can be exactly what trout are looking for during a hatch. In October, BWO versions are especially useful when fish are rising but ignoring fully formed adults sitting higher on the water.

12. Graphic Caddis

The Graphic Caddis imitates a caddis pupa as it moves toward the surface, making it a good option when trout are feeding below emerging adults. Fish it on a dead drift through likely holding water, then let it swing toward the surface at the end of the drift. That change in direction can imitate a natural caddis emergence and trigger a grab.

13. Goddard Caddis

The Goddard Caddis is a highly buoyant dry that rides well in broken water. Its deer-hair body makes it easy to see and helps it stay afloat through riffles and faster currents. In October, it’s a good choice when you’re seeing late-season caddis activity or need a dry fly that can handle rougher water.

Streamer Flies for October

October is a great time to have a streamer rod ready.

Streamers imitate larger food sources like baitfish, sculpins, and leeches, and fall can put some of the biggest trout in the river on the move.

Instead of blindly pounding every piece of water, concentrate on places that give trout both cover and an easy opportunity to ambush prey: undercut banks, deeper runs, ledges, boulder pockets, and slower water along heavier current.

Change your retrieve until the fish tell you what they want. Some days that's a fast, aggressive strip. Other days a slow swing, short strips, or even a dead drift gets the grab.

If you want a dedicated box for this style of fishing, the Streamer Surge Fly Fishing Flies Kit gives you a mix of streamer patterns built for covering water and targeting aggressive trout.

Brown trout can become particularly aggressive during fall. If that's what you're targeting, our guide on how to target brown trout in fall goes deeper into structure, timing, and presentation.

14. Bunny Leech

A Bunny Leech is a great fall pattern when you want to show trout a larger meal. The rabbit strip creates a lot of movement in the water, even at slower speeds. Fish it around deeper runs, undercut banks, structure, and slower water where larger trout may be holding. Vary your retrieve until you find what gets a response.

15. Muddler Minnow

The Muddler Minnow is a versatile streamer that can suggest a sculpin, baitfish, or even a larger terrestrial depending on how you fish it. Its clipped deer-hair head adds movement and helps it push water. In October, work it around undercut banks, deeper runs, and structure. Strip it, swing it, or slow things down if the fish aren't willing to chase.

16. Butt Monkey

The Butt Monkey is a larger sculpin-style streamer built to move water and get noticed. It's a good choice when you're targeting bigger trout around deep runs, banks, and structure where sculpins naturally live. Fish it low with short, deliberate strips or a stop-and-go retrieve, and vary your speed until you find what gets a response.

17. Grizzly Zonker

The Grizzly Zonker is a baitfish-style streamer with plenty of movement from its strip wing. That movement makes it a useful pattern when you're covering water or targeting trout around deeper runs, banks, and structure. Fish it with steady strips, short pauses, or on the swing, and adjust your retrieve based on how aggressively the fish are reacting.

18. Slump Buster with Cone

The Slump Buster is built to get down and move water, making it a strong choice for deeper fall runs and heavier current. Its compact profile can imitate baitfish or sculpins without being overly bulky. Strip it, swing it, or work it close to the bottom around structure where larger trout have room to ambush prey.

19. Bow River Bugger

The Bow River Bugger combines elements of a Woolly Bugger and Muddler Minnow, making it a versatile pattern for fall trout. You can dead drift it near the bottom, swing it through a run, or fish it more actively like a streamer. In faster or deeper water, adding a little extra weight can help keep it in the zone longer.

20. Muddy Buddy

The Muddy Buddy is a good searching streamer when you’re covering water and trying to find active fish. Its profile and movement can suggest a small baitfish or sculpin, making it useful around banks, boulders, and deeper seams. Fish it with short strips, a steady retrieve, or a swing and let the trout tell you how aggressive they want it.

Choosing the Right Flies in October

You don't need to fish all 20 of these patterns in a day. The goal is to have enough variety in your box to adjust when conditions change.

Start by watching the water. If trout are rising, look for mayflies, midges, or caddis and match what you're seeing. If nothing is happening on top, work nymphs through likely feeding lanes. And when you want to cover water or target larger trout around structure, don't be afraid to pull out a streamer.

October can change quickly. Having a mix of nymphs, dries, emergers, egg patterns, and streamers lets you change with it instead of trying to force the same fly all day.

About the Author

This guide was written by Matthew Bernhardt, a Colorado-based angler with more than 35 years of experience fly fishing Western rivers. He is the founder and owner of Drifthook Fly Fishing, which he has operated since 2015.

Matthew focuses on helping anglers understand trout behavior, seasonal hatches, fly selection, and presentation so they can make better decisions on the water.