The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
In 32 records from GBIF, adults of this species have mostly been collected during October (22%), September (22%), November (19%), August (13%), March (9%), and December (6%).
In 10 records from GBIF, this species has been collected at elevations ranging from 34 to 6972 ft, with an average (median) of 502 ft.