Dry FliesCDC&Elk
The CDC&Elk is a versatile dry fly pattern designed by Hans Weilenmann in 1992 that combines the proven wing silhouette of Al Troth's Elk Hair Caddis with the natural movement of CDC fibers. This deceptively simple pattern works as a caddis imitation, mayfly match, emerger, or general searching pattern across diverse waters.
Spring, Summer, Fall
Beginner
Trout
Overview
Hans Weilenmann created the CDC&Elk based on his "trigger" philosophy—offering fish multiple positive triggers to elicit a strike response. The straggling CDC barbs suggest legs, antennae, trailing shucks, or crippled wings, while the deer hair wing provides excellent buoyancy. Since its creation, the pattern has proven effective across multiple continents on a wide variety of trout waters.
Pattern Characteristics
Materials
Hook: Tiemco 102Y, #11-#17 (or equivalent dry fly hook)
Thread: Brown 6/0
Body/Hackle: CDC feather (Type 1)
Wing/Head: Fine-tipped deer hair
Fishing Tips
Season
Most effective from spring through fall during caddis and mayfly hatches, typically March through October. Also works as a reliable searching pattern during hatchless periods.
Presentation
Cast upstream or across and allow to dead drift through likely holding water. Can also be skated lightly to imitate an egg-laying caddis or twitched gently to simulate movement.
When to Use
Excellent during caddis emergences, mayfly hatches, or anytime surface-feeding fish are active. Works well when fish are keyed in on emergers or cripples in the film.
Water Type
Effective in freestone rivers, spring creeks, and tailwaters. Also produces well in stillwater situations when fish are rising to the surface.
Rigging Suggestions
Fish on 9-12 foot leader with 4X-5X tippet depending on conditions. Can be used as the dry fly in a dry-dropper rig with a small nymph beneath.
Visibility & Floatation
Floats exceptionally well due to the CDC body and deer hair wing. The elk hair wing provides good visibility in various light conditions. Apply floatant sparingly to maintain natural presentation.
