Stop missing trout that “refuse” your dry flies. During a caddis emergence, trout often ignore surface adults to hunt vulnerable pupa rising through the water column. This often looks like a “missed strike” or a swirl. This is actually a fish keying in on a subsurface meal.
Patterns like the Mr. Rapidan Soft Hackle (Mr. Rapidan Emerger Fly Tying Kit) excel in these situations. These imitate both the action and profile of an emerging caddis. Turning hesitant looks into confident takes when traditional nymphs and dries fall short. In the smallmouth bass arena, we often see splashy rises in the slower water. These splashy “rises” are the result of the bass charging toward the emerging insect and, in effect, over-running their target. Whether the individual bass are successful in their chase is a matter of skill on the part of the fish.
Pro Tips for More Fish:
The Swing: Finish your drift by swinging soft hackles through riffles and seams to trigger aggressive takes particularly on larger water than the Mountain Trout Streams.
Target the Rise: Add a Dry Fly with an Emerger tied 6″ below the dry as a dropper. We call this “Short Leashing a nymph”
Trigger Strikes: Add subtle lifts during the drift to mimic active, swimming pupa.
- Dead drift just below the surface before adding subtle movement.
- Swing soft hackles at the end of the drift to imitate rising insects.
- Fish emergers as a short leashed dropper behind a dry fly (6-8″ behind the dry).
- Focus on riffles and seams where trout intercept ascending pupa
- Employ a “lift” or “jigging” action- as your fly touches the bottom of the stream. Gently lift it from the bottom four inches and allow it to sink to the bottom emulating an emerging caddis.
When trout or bass refuse dries during a hatch, switching to a caddis emerger often produces. I use mergers instead of a heavier nymph.
Choosing the Right Caddis Emerger
The best caddis emerger pattern depends on water speed, depth, and trout behavior:
- Need to get deeper quickly? Choose a slim, low-bulk pattern like a Blowtorch and a bounce retrieve.
- Fishing mid-column or during active emergence? Patterns like a Casual Dress Nymph shine.
- Seeing subtle surface rises? Go with a Mr. Rapidan Soft Hackle with little to no weight.
Matching the behavior of the emerging insect is the key to consistently catching trout during a caddis hatch.
The Mr. Rapidan Soft Hackle is my go-to caddis emerger pattern. Whenever I see natural caddisflies crawling on streamside rocks or fluttering above the water. Adjusting the amount of weight is critical. The goal is to drift just the emerger just below the surface, where emerging caddis are most vulnerable. For novice anglers, a caddis emergence can be confusing to recognize and fish effectively. In our On-the-Stream Schools, we teach this lifting technique —imitating a rising pupa—which frequently triggers aggressive strikes.
Fish focused on emerging caddis, frequently ignore dry flies and instead target flies just beneath the surface. This selective feeding often shows up as splashy rises and frustrating refusals.
Proven Sizes for Trout
Sizes 10, 12, 14, and 16 are ideal for trout around the world.
Size 12 & 14: Ideal during caddis hatches. These sizes closely match the natural insects in profile and behavior. Making them highly effective when trout are feeding just below the surface. Fish these on a 7 1/2′ 4x or 5x Leader with a Fluorocarbon Tippet.
Size 16: A top choice on native brook trout streams, where a smaller caddis emerger provides a more natural presentation. This pattern often fools selective fish in clear, pressured water. Fish these on a 6′ 5x or 6x Mountain Leader with a Fluorocarbon Tippet.
Proven Sizes for Smallmouth Bass
Sizes 8 & 10: For smallmouth bass fly fishing, these sizes are effective for imitating Hexagenia, Brown Drakes, and larger caddis species. Their bigger profile makes this emerger pattern a versatile choice not only for trout streams but also for rivers and warmwater fisheries. During heavy insect activity, smallmouth often target emerging insects just below the surface, which typically shows up as subtle swirls and boils as bass chase caddis pupae rising through the water column.
How to Fish the Mr. Rapidan Soft Hackle Nymph for Smallmouth Bass
To maximize success during a hatch cast across and slightly upstream at a 20-degree angle with the current using a 9′ 3x Bright Butt Leader with a Fluorocarbon Tippet. Using enough weight to reach the bottom of the stream but not so much that the current cannot bring the fly to the surface at the end of the drift.
Allow the fly to swing naturally in the current. Every two to four feet of drift, apply a slow six-inch rod lift to imitate the upward movement of an emerging caddis. This subtle lift mimics a caddis breaking free and rising toward the surface — often triggering aggressive strikes from fish keying in on emerging insects.
If you’re targeting fish feeding during a caddis hatch, the Mr. Rapidan Soft Hackle is a proven emerging caddis pattern designed to convert refusals into confident takes.
If you are interested in learning the techniques we discussed in this article, sign up for one of our On-the-Stream Schools for Smallmouth Bass or Trout or Guided Fly Fishing Trip.