The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
Preferred waters: Stillwaters or streams of any size
In 121 records from GBIF, adults of this species have mostly been collected during August (26%), September (25%), July (22%), June (17%), and October (7%).
In 78 records from GBIF, this species has been collected at elevations ranging from 3 to 8005 ft, with an average (median) of 789 ft.