The San Juan Worm Chartreuse is a high-visibility twist on a classic pattern, ideal for attracting trout in stained water, deep runs, or after spring runoff. Its bright, almost fluorescent body color draws immediate attention and serves as both a natural annelid imitation and a bold attractor fly when fish are aggressively feeding or visibility is poor. This is a go-to choice during high water, post-storm surges, or any time trout are keying in on drifting worms.

Tied with supple chartreuse chenille on a curved hook, this fly delivers natural movement while maintaining a simple, clean profile. The color stands out in low-light or off-color conditions, making it especially effective on tailwaters and freestone rivers alike.

To fish the San Juan Worm Chartreuse effectively, drift it under an indicator along seams and through pockets, or use it as the anchor fly in a two-fly euro nymph setup. It’s especially productive in early spring or during runoff when worms become dislodged and abundant in the drift.