NymphSan Juan Worm
The San Juan Worm is a simple yet highly effective pattern that imitates aquatic worms, a favorite meal for trout. This fly can be deadly in high, off-color water after rain or snowmelt washes worms into the river.
Year Round
Beginner
Trout
Overview
One of the simplest and most effective flies — just a short length of Ultra Chenille or vernille tied to a curved nymph hook, sometimes with a bead. Variants include weighted versions or those with contrasting tails. Tied in red, pink, brown, and tan.
Pattern Characteristics
Materials
Hook: Tiemco 3761, sizes #12–#14
Thread: Pink UNI 6/0
Body: Brown Ultra Chenille
Glue: Head Cement
Fishing Tips
Season
The San Juan Worm can be effective year-round but is especially deadly after rain or snowmelt.
Presentation
Dead drift this fly near the bottom using a strike indicator.
When to Use
Use this fly when fishing high, off-color water after rain or snowmelt.
Water Type
This pattern is effective in rivers and streams.
Rigging Suggestions
Fish this fly on a 9' 4x leader with a strike indicator.
Visibility & Floatation
This fly is designed to sink and imitate a free-drifting worm. The red color is highly visible in off-color water.
