The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
In 30 records from GBIF, adults of this species have mostly been collected during July (33%), June (20%), April (17%), August (10%), September (10%), and May (7%).
In 10 records from GBIF, this species has been collected at elevations ranging from 3 to 5449 ft, with an average (median) of 2238 ft.