Michigan — Hatch Calendar
Michigan's northern Lower Peninsula is the heart of Upper Midwest trout fishing — sand-bottomed, spring-stable rivers famous for the Hex hatch, the night-fishing event of the American season, and a mayfly calendar that runs from Hendricksons to Tricos.
September 2026
1
5
10
15
20
25
30
Mayflies
Caddis
Midges
Terrestrials
Active range Peak period Sparse Heavy / Blanket