The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
I found this female already spent and nearly dead, laying in the surface film of a very tiny spring seep (inch-deep water) in the valley of a very small trout stream.
This mayfly was collected from Mystery Creek #199 in Washington on July 28th, 2019 and added to Troutnut.com by Troutnut on July 30th, 2019.