The Dry-Dropper Rig: One Setup That Covers the Whole River

If you had to fish one rig for a whole season on moving water, this would be it. A buoyant dry fly on the surface, a weighted nymph hanging below it, and no indicator anywhere — because the dry fly is the indicator, and unlike a plastic bobber, trout eat it.

The dry-dropper covers two feeding depths in one cast, tells you instantly when a fish takes below the surface, and lands far more quietly than an indicator rig. On pocket water, riffles and bank seams it is close to unbeatable.

The anchor fly does the real work

Everything depends on the dry staying up. A dry that sinks under the weight of the nymph turns the whole rig into a bad indicator setup, so this is not the place for a delicate hackled fly.

Foam is the reliable answer. The Chubby Chernobyl is the workhorse — stacked foam and a poly wing make it effectively unsinkable, it will carry a tungsten bead all day, and it passes for a stonefly, a hopper or a big beetle depending on the water. Amy's Ant does the same job with more movement, because the rubber legs keep working even when the drift is dead.

When fish are pressured and a big foam fly is too much, drop to a Stimulator. The double-palmered hackle and elk wing float well enough to carry a light nymph, and the profile is quieter. On smooth water, a Parachute Adams will hold a small bead head and looks like nothing at all — which is sometimes exactly what is needed.

Attaching the dropper

Tie the dropper tippet to the bend of the dry fly’s hook with a clinch knot. It is quicker than any alternative, it does not weaken the leader, and it lets the nymph swing freely.

Some anglers use a tippet ring or tie off the eye. Both work. The hook bend is simplest and it is what most guides do, so start there.

Step down one size in tippet for the dropper — 3X to the dry, 4X to the nymph. If the nymph snags on the bottom, which it will, you break off the nymph and keep the dry.

How long should the dropper be?

The single most common mistake is fishing it too short. Set the dropper so the nymph rides just above the bottom — that usually means one and a half to twice the water depth, not the depth itself, because the current pushes the fly downstream as it sinks.

• Shallow riffles, one to two feet: 18–24 inches of dropper.
• Standard pocket water, two to four feet: 3–4 feet.
• Deeper runs: go past about five feet and the rig becomes hard to cast. That is the point to switch to an indicator rig instead.

Adjust it constantly. Changing dropper length as you move between runs matters more than changing flies.

Choosing the nymph

The dropper should be heavy for its size, because it has to get down inside a short drift. A Copper John is the classic choice — the wound copper wire body sinks fast enough that you do not need split shot, and it is a credible mayfly nymph rather than just a weight.

In freestone rivers with a stonefly population, Pat's Rubber Legs under a Chubby is one of the most productive combinations in western fly fishing. When you have no idea what fish are eating, hang a Bead Head Hare's Ear underneath and let it suggest a mayfly, a caddis and a scud all at once.

Reading the take

Set on anything the dry does that the current did not tell it to do. It does not have to disappear. Most dropper takes show as the dry stalling, twitching sideways, or dipping an inch and coming back up.

The instinct to wait for a clean pull costs a lot of fish. A trout takes a nymph and rejects it in well under a second, and the signal reaching the dry is muted by three feet of tippet. If in doubt, lift — a set costs you nothing but a re-cast.

Fishing it

Cast at the bank, the seam, or the pocket behind a boulder, and mend immediately to give the nymph a chance to sink. Keep the drift short. This rig is at its best covering a lot of small, likely-looking pieces of water rather than making one long drift down a pool.

Let the swing at the end of the drift happen rather than ripping the flies out. The nymph rising through the column at the end of a drift is a genuine trigger, and plenty of fish take there.

When to stop using it

Be honest about the conditions. If the water is deeper than about five feet, or fish are rising steadily to a specific hatch, or the wind will not let you turn the rig over, the dry-dropper stops being the best tool. Switch to an indicator nymph rig or a single dry and fish that properly instead.

The short version

• Foam anchor fly. It has to float with weight under it.
• Clinch knot to the hook bend, one size finer tippet.
• Dropper length one and a half to two times water depth, adjusted every run.
• Heavy-for-size nymph so it sinks inside a short drift.
• Set on any unnatural movement of the dry, not just a disappearance.