A classic wet fly for evening mayfly activity. The Dark Cahill Wet suggests an emerging or drowned dark-toned mayfly; its soft hackle breathes on the swing, and the slim, understated body keeps the look natural in clear water and gentle glides.
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When it excels: Late spring through summer evenings during Dark/Light Cahill-style hatches; riffle tails, seams, and soft flats
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Why it works: Subtle dark body and mobile soft hackle create a convincing mayfly silhouette that pulses on the swing and lift
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Pack size: 3 flies
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Targets: Trout (rainbow, brown, brook)
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Ready to fish: Durable wraps and clean proportions for repeatable, natural drifts
How to fish it
Cast down-and-across and let it swing slowly through the seam; add a gentle lift at the hang-down to trigger eats. In slicks, grease the leader to keep the fly just under the film, or fish it as the top fly above a small nymph. Use 4–5X and keep swings short and controlled.
Care
Rinse after use and air-dry before boxing to prevent hook corrosion.
Satisfaction
30-day returns/exchanges.