The San Juan Worm is a simple yet incredibly effective fly pattern that imitates aquatic worms, a staple in the diet of trout, especially in tailwaters and high-water conditions. Its realistic, worm-like profile makes it particularly effective in murky waters where visibility is low, and fish are feeding near the bottom. The San Juan Worms simplicity and versatility allow it to be fished in various nymphing setups, making it a reliable choice for targeting trout in both rivers and streams. This fly is a must-have for any angler looking to add a dependable, go-to pattern to their fly box.