East Rosebud Fly & Tackle Fishing Report-September 2025 

 

Bighorn River report

This year has been a low water year for the Bighorn River. Unlike many other fisheries this can provide very good opportunities to anglers not only for big fish, but numbers of fish. The flows lately have been hovering right around 2000 CFS. September on the Bighorn river allows anglers to really decide how they want to fish. You can find productive fishing with dry flies, nymphs and streamers. Black and tan caddis continue to bar out in numbers as well as a few tricks on the lower river.

Flies:

Hemingway caddis

Tan Elk Hare

Trico Spinner 

Grey Ray Charles 

Poodle Sniffer

Hares Ear 

Orange Scud

Rusty Trombone

Yellowstone River report

The flows are about as low as they will get for the season right now on the Yellowstone. Flows in Livingston are about 1450 CFS. This can make for tough fishing in the month of September but anglers can look forward to to more productive streamer fishing with each cold night.

Flies:

Chubby Chernobyl

Morrish Hopper

Hares Ear

Pheasant Tail 

Sparkle Minnow

The Grinch

Stillwater River report

Flows are very low and manageable for wading. Flows are around 330 CFS. Water temps are in the mid 50’s which is ideal. The fish numbers are slowly coming back following the 2022 floods. Dry fly fishing is still there through the middle and later part of the day.

Flies:

Pink Poookie 

Chubby Chernobyl

Perdigons

Prince Nymph 

The Grinch

Thin Mint

Boulder River report

The flows on the Boulder have been very low, hovering around 80 CFS. Fishing has remained fairly consistent in Big Timber using Hopper Dropper rigs or Streamers. Flows on the lower river should bump in a few weeks when irrigation water is returned to the river for the season.

Flies:

Chubby Chernobyl

Stimulator

Prince Nymph

Perdiogons

Sparkle Minnow 

The Grinch 

Thin Mint