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Capt. Ken's Custom Flies

Sulfur Soft Hackle Fly – Sulfur Wet Fly for Trout #14–18

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Sulfur Soft Hackle Fly – Traditional Sulfur Wet Fly

A classic soft hackle wet fly for imitating emerging Sulfur mayflies and other yellow-bodied aquatic insects. Excellent fished just beneath the surface or as a dropper below a dry fly.

Description

The Sulfur Soft Hackle is a traditional wet fly pattern that excels when trout are feeding on emerging mayflies just below the surface. Its soft hackle materials provide natural movement in the water, creating the appearance of an emerging insect struggling toward the surface.

During a Sulfur hatch, trout often feed on insects before they fully emerge as adults. This is when a soft hackle can be particularly effective, especially when fish are ignoring conventional dry flies.

Available in sizes #14 through #18, this pattern provides a useful range of sizes for matching different Sulfur and yellow-bodied mayfly hatches. These include important Eastern mayflies such as Ephemerella invaria and Ephemerella dorothea, along with other regional Sulfur-colored species.

Why We Fish It

  • Natural soft hackle movement: Creates lifelike motion beneath the surface.

  • Emerging insect imitation: Effective when trout are feeding on emerging mayflies.

  • Versatile presentation: Can be fished alone, swung through current, or suspended beneath a dry fly.

  • Multiple sizes: #14–#18 to match different hatch conditions.

When to Fish It

Fish this pattern during Sulfur hatches, particularly when trout are feeding beneath the surface or when you see rises but cannot get fish to take a conventional dry fly.

It is an excellent choice for spring and summer trout fishing on the Upper Delaware River and other Eastern streams with active Sulfur hatches.

How to Fish It

There are several productive ways to fish this pattern:

  • Swing it: Cast across or slightly downstream and allow the fly to swing naturally through feeding lanes.

  • Fish it beneath a dry fly: Use it as a dropper below a floating Sulfur dry fly to cover both surface and subsurface feeding activity.

  • Dead-drift it: Present the fly naturally through seams and current breaks where trout are feeding.

Experiment with depth and presentation until you determine where the trout are feeding.

Details

  • Pattern: Sulfur Soft Hackle

  • Fly Type: Soft hackle wet fly

  • Imitates: Emerging Sulfur mayflies and other yellow-bodied aquatic insects

  • Scientific Names: Ephemerella invaria and Ephemerella dorothea, among other regional Sulfur species

  • Available Hook Sizes: #14, #16, and #18

  • Available Options: Single fly, 3-pack, 6-pack, or 12-pack

12-Fly Selection: Includes four flies in each size (#14, #16, and #18).

Don't overlook the feeding activity taking place just beneath the surface during a Sulfur hatch. Add Capt. Ken's Sulfur Soft Hackle to your fly box and have a proven wet fly option ready when trout aren't taking naturals off the top.