20 Incher - Flies, Nymphs | Jackson Hole Fly Company

20 Incher

106-6

Regular price$2.49
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Size

The 20 Incher is a large, attractor-style stonefly nymph pattern designed to imitate the larger species of stoneflies, which are a significant food source for trout, especially in fast-moving, rocky rivers and streams. The name "20 Incher" refers not to the size of the fly itself, but to the size of the trout it is capable of attracting. Typically, this fly is tied on a size 6 to 12 hook, making it one of the larger patterns in a trout angler's arsenal.

The 20 Incher is characterized by its robust, segmented body, tied with peacock herl which gives it a naturally iridescent and appealing appearance. The fly also includes a heavily weighted beadhead to help it sink quickly in fast-moving water. This pattern has a pronounced thorax, made from chenille, and it features legs made from pheasant tail fibers, adding to its lifelike movement in the water.

The 20 Incher is particularly effective in waters where large stoneflies are present, especially during and just after their hatching periods. Its large size and high visibility make it a great choice for fishing in deeper pools and faster runs where smaller flies might go unnoticed.

This pattern is often fished along the bottom using a nymphing technique, either alone or as part of a multi-fly setup with a smaller nymph trailing behind. The weight of the fly allows it to get down into the feeding lanes of larger trout, and its lifelike appearance and motion often trigger aggressive strikes. Given its size and attractiveness, the 20 Incher is a go-to fly for anglers looking to land larger trout, hence the implication of its name.

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