San Juan Worm Fly

San Juan Worm

Simple pattern, imitates aquatic worms, chenille body, adaptable colors/sizes.

How the San Juan Worm is tied

The San Juan Worm is a simple pattern that's tied using a short or medium shank hook and a single material, typically chenille or a soft, stretchy material like Ultra Chenille. The chenille or similar material is tied in at the bend of the hook and then wrapped around the hook shank to create a cylindrical shape, imitating an aquatic worm. The length of the worm can be adjusted based on local worm populations and the preferences of the target fish. The San Juan Worm can be tied in various sizes and colors, such as red, pink, or tan, to match local aquatic worm populations and water conditions.

What the San Juan Worm mimics

The San Juan Worm is designed to imitate aquatic worms, such as annelids or midge larvae, which are a common food source for many fish species, including trout. Its simple profile and natural movement make it an effective and enticing imitation of these subsurface organisms, particularly during high water or discolored conditions when worms may be dislodged and become more available to fish.

Where the San Juan Worm is used

The San Juan Worm can be used in various water types. It is particularly effective during high water or discolored conditions when fish are more likely to be feeding on aquatic worms or other dislodged subsurface insects. To fish the San Juan Worm effectively, use techniques such as dead drifting, or nymphing.

Because of the way it's tied, it's color and the it's application it's very similar to the Squirminator.

Fly tying video for the San Juan Worm

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Fish you can can fly fish for with the San Juan Worm



Brook trout

Brown Trout


Common Carp

Cutthroat Trout

Golden Trout



Largemouth Bass

Marble Trout


Rainbow Trout



Smallmouth Bass



Butterflies and Moths (Latin: Lepidoptera)

The San Juan Worm mimics one or more species from the insect order Butterflies and Moths

Latin: Lepidoptera

Lepidoptera, encompassing butterflies and moths, are insects with scaled wings, important for pollination and as a food source for other species.

Read more about Butterflies and Moths

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