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.
Entoman on Jun 3, 2014June 3rd, 2014, 12:25 pm EDT
Welcome to the forum, BDK.
Those are Isonychia (Leadwing Coachman) mayfly nymphs.
"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman