The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
In 54 records from GBIF, adults of this species have mostly been collected during June (43%), July (28%), May (20%), and August (6%).
In 39 records from GBIF, this species has been collected at elevations ranging from 3 to 5167 ft, with an average (median) of 1751 ft.
Current speed: Fast
Environmental tolerance: Prefers cold, clear water