Ask MidCurrent: What’s the Best Way to Fish After a Hatch is Over?

This brown fell for a streamer about an hour after a large hatch of caddisflies ended. Photo: Phil Monahan

  Question: I know that before a hatch, I should fish nymphs and then emergers. But what do I do after the hatch ends and fish aren’t rising anymore? Do I just go home?
—Evan P., Easton, PA (via the Ask MidCurrent form)

Answer: When an insect hatch tapers off, trout behavior often shifts noticeably. During a hatch, many trout stack up in feeding lanes and rise eagerly, but once the emergence ends, trout may seem to disappear. In reality, they often remain in their positions and continue feeding subsurface on whatever food is left. Trout are opportunistic feeders and will linger to scavenge the leftover nymphs, pupae, spent spinners, and crippled insects after the main hatch is over. Only in the rare case of an exceptionally massive hatch (like a Hexagenia emergence) will trout become truly satiated and stop feeding for a while. More commonly, the fish remain willing to eat, but they change where and how they feed.

Post-hatch, trout often shift back to subsurface feeding, picking off drifting food in the current or cruising slower eddies for stranded insects. Look for foam patches that may collect cripples.After a hatch of large bugs, like stoneflies, trout might even continue looking up for big meal opportunities. Understanding this behavior is key: after a hatch, trout haven’t left the river or shut down completely – they’ve simply changed their feeding focus. This is your cue to adjust tactics and flies to match the trout’s new feeding mode.

Dead-Drift Nymphs

One of the most effective post-hatch strategies is to dead-drift nymphs. After gorging on hatching insects, many trout will resume feeding on subsurface foods. Start by tying on a nymph pattern similar to the insects that just hatched. For example, if trout were rising to blue-winged olives (BWOs), switch to a small BWO nymph or emerger pattern drifted near the bottom or mid-column. There are always some trout that stayed deeper during the hatch, and they’ll be eager to eat nymphs. Even trout that did feed on the surface may still grab an easy subsurface meal as the hatch wanes.

Clockwise from upper left: WD-40, Bread Line Emerger, Cripple Dun, and TFP PMD Cripple. Photos via Fly Fish Food

Make sure to get the nymphs down to where the fish are; adding a bit of weight or using beadhead patterns helps keep your fly in the strike zone. Post-hatch trout might not strike as obviously as during a rise, so watch for subtle movement of your line or indicator.

Emergers and Cripples in the Film

Even though trout may stop visibly rising once a hatch concludes, they often continue to sip stranded insects near the surface. After a hatch, many dying or crippled duns (and late-emerging bugs) get caught in the surface film, offering easy pickings for trout. These “leftover” bugs collect in slow water seams, eddies, or along calm banks just outside the main current. Trout feeding on them tend to barely break the surface because the insects are helpless and not escaping, so careful observation is required.

To target these feeders, use low-riding emerger or cripple patterns that match the hatch that just ended. If you aren’t getting any takes, let the pattern sink; sometime the fish are feeding inches below the surface and aren’t willing to take anything higher in the water column.

Look for areas where currents concentrate these stranded bugs: slow eddies, backwaters, or against structure on the margins. It may require moving around and watching the water closely. When you find such a spot, approach with stealth, as these trout can be wary. A downstream presentation or a reach cast that puts the fly first helps avoid spooking fish in slow water. Patience is key: let the fly drift repeatedly and be ready for subtle evidence of a take, such as a slight dimple or just the white of a trout’s mouth.

You might also try fishing a small emerger or cripple fly as a dropper behind a more visible dry fly. The dry fly acts like an indicator, and trout will often take the trailing emerger just below the surface.

Don’t overlook wet flies and Soft Hackle patterns as part of a post-hatch strategy. Swinging a Soft Hackle down and across through likely areas can imitate drowned adults or emergers. This technique is especially useful in the evening or when you’re not seeing individual rises but suspect trout are feeding just under the surface. As the fly swings and rises at the end of the drift, it looks like an insect struggling in the film, a trigger for trout to strike.

After a hatch fades, big trout often lurk near bankside currents or under overhanging branches, casually sipping crippled insects that collect in the slack water. These fish can be tempted by a well-presented emerger or wet fly drifted into their quiet feeding zone. Matching the “stragglers”—the emergers, cripples, and spent bugs—with the right presentation can keep you on trout even after the main hatch activity is over.

Big Dessert

When the insect buffet shuts down, sometimes the best way to entice trout—especially larger browns—is to change the menu entirely. Streamer fishing can be deadly after a hatch has ended, offering trout a high-protein meal and triggering predatory instincts. In fact, if a hatch was strong and trout gorged themselves, some fish may ignore small leftovers but will react aggressively to a sizable streamer.

Trout that fed on mayflies or caddisflies might now be more interested in chasing baitfish or larger prey, especially as light levels drop in evening. Big brown trout in particular are predominantly nocturnal and don’t really mess with that little stuff once night falls, but they’ll pounce on a sculpin, crayfish, or baitfish pattern with gusto.

This rainbow was holding tight to the bank after a sulfur hatch, and a Woolly Bugger triggered a strike. Photo: Tom Rosenbauer

After the hatch, try working a streamer through deeper pools, around structure, or in the same areas where trout were rising earlier. (They probably haven’t gone far.) Cast across or slightly downstream and retrieve with an erratic strip, or swing the streamer on a tight line across the current. Vary your retrieves: sometimes a fast, aggressive strip provokes a reaction strike, while other times a slow, pulsing retrieve near the bottom imitates a crayfish or sculpin.

If dusk is falling or visibility is low, trout often feel emboldened to chase. An effective twist on this approach is to dead-drift a small streamer (like a Woolly Bugger) under an indicator. Essentially, the streamer dead-drifted mimics a large morsel being carried along, and trout may grab it opportunistically.

Streamers also allow you to cover water and search for any active fish. On your way back to the truck in the evening, for instance, swinging or stripping a streamer can pick up a few bonus fish that are on the prowl. It’s a high-reward strategy; even if you won’t get as many strikes as during the hatch, the fish you do hook could be larger. Patterns that imitate the prevalent baitfish or even smaller trout in the river are wise choices. A well-presented streamer can reignite the action by appealing to trout’s hunger for one more substantial bite.

Success after an insect hatch comes down to observing the trout’s cues and being willing to change tactics. First, read the river once the hatch wanes: are trout still poking noses up in eddies (try emergers), or are they back to hugging the bottom (dead-drift nymphs), or has the light faded enough to stalk with a streamer? Often, the first half hour after a hatch ends might yield a few more fish on dries or emergers to trout still “looking up,” but as that window closes, nymphing and streamer fishing become more effective.

Stay flexible, stay observant, and you’ll turn the post-hatch period from a slow downturn into an extended opportunity on the water.

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