The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
In 37 records from GBIF, adults of this species have mostly been collected during August (57%), July (16%), September (16%), and June (8%).
In 20 records from GBIF, this species has been collected at elevations ranging from 36 to 9022 ft, with an average (median) of 6565 ft.