The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
In 42 records from GBIF, adults of this species have mostly been collected during June (29%), August (21%), July (19%), April (19%), and May (7%).
In 9 records from GBIF, this species has been collected at elevations ranging from 3524 to 9239 ft, with an average (median) of 5873 ft.