The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
Preferred waters: Large rivers
In 141 records from GBIF, adults of this species have mostly been collected during June (22%), August (20%), July (18%), September (16%), May (15%), and October (6%).
In 71 records from GBIF, this species has been collected at elevations ranging from 180 to 5955 ft, with an average (median) of 3100 ft.