March Brown Spinner
March Brown Spinner is a spent-wing mayfly pattern for trout feeding on March Brown falls during cool spring evenings. It supports March Brown Spinner fly, spent mayfly pattern, and trout hatch searches.
Imitates: Spent March Brown mayflies
Quick Reference
- Best Sizes
- #10-14
- Best Season
- Spring
- Best Conditions
- Evening flats, riffle tails, and broad glides
- Water Temp
- 48-60°F
- Recommended Tippet
- 5X-6X
How to Rig It
Fish it alone when trout are taking flat-spent mayflies after the main hatch.
How to Present It
Aim for a perfectly drag-free float with the wings lying flat on the water.
Why It Works
Spinner falls create helpless easy targets that trout often key on more steadily than duns.
History
March Brown spinner patterns remain key hatch flies on waters where trout feed hardest in the last light.
Pro Tip
Switch to it the moment rise forms flatten out after the dun hatch fades.
Frequently Asked Questions
What does March Brown Spinner imitate?+
It imitates a spent adult March Brown mayfly lying flat on the water.
Not sure if March Brown Spinner is right today?
Get a fly recommendation based on live water temp, flow, sky, and time of day for any river in the US.
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