How to Tie: The “20 Incher” Stonefly

In this week’s “How to Tie” video feature, Fly Fish Food teaches us how to tie the “20 incher” Stonefly, a fly that has earned its name with ease.

Learn About This Fly

Difficulty: Intermediate 

The “20 incher” stonefly is a stonefly nymph imitation which has been around for decades and has earned its name due to its reputation for catching huge trout. Due to its size and bead head, this is a great fly to fish in fast-moving water where you’ll need your fly to sink fast.

Although stonefly patterns are usually fished in the western part of the US, this pattern is greatly appealing to any hungry trout stubbornly hunkered under log jams, rocks, or other submerged rubble. Fished commonly as a point fly, this nymph will confidently lead your droppers into battle with soon to be netted trout.

This fly is a fantastic way for newer fly tyers who are looking to take their tying game to the next level. Due to the diversity of materials involved, and the straightforwardness of the techniques necessary, this fly is a great way to practice tying more complexed flies. Not to mention, as you see in this video, this fly is a fun way to get involved in finding your own fly tying ingredients such as off squirrels, partridge…and peacocks?


  • Daiichi 1260 Bead-Head Specialty Hook – 10
  • 8/0 UNI-Thread Waxed Midge thread – Camel
  • Plummeting Tungsten Beads – Copper – 5/32″ (3.8mm)
  • Lead Wire Spool – .020
  • Nature’s Spirit Stripped Goose Biots – Brown
  • UTC Ultra Wire – Copper – Brassie
  • Peacock Eye Sticks
  • Natural Furs Dubbing – Fox Squirrel
  • Ozark Oak Mottled Turkey Tail – Select Pair
  • Nature’s Spirit Primo Partridge Skin, Natural
  • Loon Soft Head cement – Clear

Now you know how to tie the “20 Incher” Stonefly!

Video and ingredients courtesy of Fly Fish Food 

Article written by Flylords Team Member Wills Donaldson

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