What usually hatches
- Tricos
- Caddis
- Blue-winged olives
- Late PMDs
- Terrestrials
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MONTH-BY-MONTH GUIDE
September fishing on the Bighorn.
Tricos and caddis can overlap with fall Baetis and streamer fishing.
Before your trip, compare this seasonal advice with the latest flow and water temperature.
SEASONAL GUIDE
What to expect in September
September often offers a mix of Tricos, caddis, Baetis and improving streamer fishing. Lower flows may make wading easier, but a quiet approach and a natural drift become more important.
Releases are often moderate to low, although each year is different. Weeds may remain a problem until colder nights arrive.
How to fish it
- Use a longer leader and a quiet presentation on smooth water
- Keep nymph rigs compact when fishing gaps in the weeds
- Try streamers when clouds, wind or stained water reduce visibility
How to rig
A 6–9 foot setup with modest weight is a useful starting point. Use a smaller indicator and less shot as the river drops and clears.
STARTING FLY BOX
Carry these patterns.
Sizes are starting points. Match the insects and water in front of you.
Trico spinner #20–24Black caddis #14–18Pheasant tail #18–20Sowbug #16–18Scud #16–18Perdigon #16–20Small sculpin #6–10
PACKING LIST
What to bring
- Tricos
- Baetis
- Small caddis
- Light tippet
- Layered clothing
KEEP IN MIND
Before you head out
In low, clear water, work on drag and a quiet cast before making another fly change.
Bring layers for cool mornings and warm afternoons. Lower water also calls for careful rowing and channel choices.
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