The good, old San Juan Worm is one of the best spring-time fly patterns out there, even if you might feel a bit sheepish tying it on for fear one of your buddies will see you casting it and accuse you of high-brow cheating.
Of course, you’re not cheating—you’re imitating an aquatic food source that’s common in most trout waters, and is especially prominent in spring when flushing flows scour stream banks and load rivers with real worms.