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.
The Beaverkill is perhaps the most famous fly fishing stream in America, largely because of its history, and it can still be a good one if you don't let its history spoil your expectations.
Almost every pool has a name and a story or three in the great works of fly fishing literature.