Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
This small stream flows into the White River near Mt. Ranier. It is rumored to have trout, although perhaps overfished. I fished it once without catching anything, but it was July 8th and the creek was still high and cold with snowmelt.