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The June Fly Box for Catskills Trout

By My Custom FlyBox Team

Rows of hand-tied trout nymphs arranged in a fly box
Photo: My Custom FlyBox (All rights reserved)

The June Fly Box for Catskills Trout

June is the month when a Catskills trout box can get too full in a hurry. The Hendricksons are mostly behind you, but the river is not simple yet. Sulphurs can be steady. Green Drakes and Coffin Flies can make people do foolish things with their calendars. Caddis are still important. March Browns and Gray Foxes may linger. Isonychia start to matter. Light Cahills begin showing up as the month moves along. On a damp afternoon, olives can still get trout looking up when the larger bugs do not show.

That mix is what makes June good. It is also what makes anglers carry three boxes when one well-planned box would fish better. You do not need every mayfly pattern ever tied for the Beaverkill, Willowemoc, East Branch, or West Branch. You need a working set of flies that covers size, stage, light level, water type, and the way trout actually feed when flows start dropping and water temperatures begin to matter.

If you are planning a same-day trip, check the current Beaverkill and Willowemoc report and the West Branch Delaware report before you pack. June can look like spring at breakfast and summer by late afternoon. The right fly depends on the river you choose, the temperature trend, and whether you are fishing a freestone riffle, a shaded pool, or a cold tailwater seam.

Build the Box Around June Decisions

A good June box starts with decisions, not Latin names. Ask what the trout are most likely to do where you are going.

On the Beaverkill and Willowemoc, June often gives you fishable mornings, shaded riffles, evening spinner falls, and periods when lower freestone water gets too warm or too bright. Trout may still eat large mayflies in the right window, but they are less forgiving than they were during peak spring. The holding water becomes more defined. Fish slide into broken current, deeper pockets, bank shade, and oxygenated heads of pools.

On the West Branch Delaware, reservoir releases can keep sections colder and extend dry-fly opportunity when nearby freestones are marginal. That does not mean the whole system is cold everywhere. Tailwater temperature changes with distance from the dam, release volume, tributary input, sun, wind, and air temperature. A box for the West Branch should lean harder into sulphurs, olives, emergers, spinners, and precise presentations.

Before the first cast, make three checks:

  • Is the river rising, falling, or stable on the gauge?
  • Is the water temperature suitable for trout fishing where you are standing?
  • Are fish feeding on top, just under the film, or tight to bottom?

Those answers matter more than whether you own six versions of a Green Drake dun.

The Core Dry Fly Row

The June dry fly row should cover sulphurs, caddis, larger mayflies, smaller olives, and late-day spinners. Keep it organized so you can change quickly without digging through spring leftovers and midsummer terrestrials.

For sulphurs, carry sizes 14 through 18, with a few 20s for technical tailwater fish. You want more than one stage. A high-floating dun is useful in choppy water, but many June trout eat emergers and cripples in the film. Pack comparaduns, sparkle duns, parachutes, CDC emergers, and a few rusty or pale spinners. On the West Branch, a trout feeding in a flat seam may refuse a tall fly all evening and then eat the same size pattern when it rides lower.

For caddis, carry tan and olive patterns in sizes 14 through 18. Elk Hair Caddis, X-Caddis, CDC caddis, and a few spent caddis patterns are enough. Caddis often show themselves with splashy rises, quick slashes, or fish moving in broken riffle water. If you see adults bouncing and skating but trout are missing your dry, try giving the fly a small twitch at the end of a clean drift. If fish keep bulging without noses, move to a pupa or soft hackle.

June is also a month for big mayfly chances. Green Drakes, March Browns, Gray Foxes, Brown Drakes, and larger spinners do not need to fill the whole box, but they deserve a row. Carry sizes 8 through 12 for the largest drakes and sizes 10 through 14 for March Brown and Gray Fox water. Include duns, emergers or cripples, and Coffin Fly spinners. The spinner pattern may be the one that matters most. A hatch can be scattered, but a spinner fall at dusk can focus every good trout in a pool.

Blue Wing Olives belong in the box even when June feels warm and bright. Carry sizes 18 through 22. They are especially useful on cloudy days, cool tailwater sections, or after weather changes. A small olive emerger can save a day when anglers around you keep waiting for a larger hatch that never quite arrives.

Light Cahills and cream-colored evening mayflies start to earn space by mid-June. Sizes 12 through 16 are useful on freestones and some Delaware water. They are not complicated flies, but they are easy to overlook if your box is still built around May.

Do Not Skip the Spinner Compartment

A lot of June frustration comes from fishing the right insect at the wrong stage. The angler sees sulphurs, ties on a dun, and wonders why trout keep rising beside the fly. Sometimes the fish are eating emergers. Sometimes they are eating spinners. Sometimes they are taking spent caddis or drowned adults that look nothing like the crisp dry in your hand.

Give spinners their own small compartment. Include rusty spinners in sizes 12 through 20, sulphur spinners in 14 through 18, Coffin Flies in 8 through 10, and a few cream or light cahill spinners in 12 through 16. If you fish until dark, these flies should be easy to find by feel and silhouette. Dusk is a poor time to sort through a mixed pile of dries with a headlamp turned up bright enough to spook the pool.

Watch the rise form. A confident nose in slow water can mean spinners. A porpoising rise or bulge may mean emergers. Splashy takes in broken current often point to caddis or active mayflies. The fly choice begins with observation, not with the hatch chart.

Nymphs That Carry the Slow Hours

June still has slow hours. The sky gets high. Wind comes up. A hatch stalls. The river drops and fish quit showing themselves. That is when a simple nymph row keeps you fishing honestly.

A practical June nymph row includes:

  • Pheasant Tail, sizes 14 to 20.
  • Hare's Ear, sizes 12 to 18.
  • Sulphur nymph or yellow-bodied mayfly nymph, sizes 14 to 18.
  • Caddis pupa, sizes 14 to 18.
  • Walt's Worm or Sexy Walt's, sizes 14 to 18.
  • Isonychia nymph, sizes 10 to 14.
  • Small perdigon or slim mayfly nymph, sizes 16 to 20.

On freestones, do not think only about deep dredging. June trout often sit where food arrives with cover: the cushion below a rock, the seam beside faster water, the first drop below a riffle, or the shaded bank lane that is difficult to approach. Shorter casts and cleaner drifts beat a long rig dragging through three currents.

On tailwaters, smaller nymphs and lighter adjustments often matter. A size 18 mayfly nymph or caddis pupa behind a dry can cover fish that are feeding just below the surface. If trout are rising occasionally but not enough to read clearly, a dry-dropper with a sulphur emerger or slim nymph can be a good searching rig. Keep the dropper short enough to control and light enough that it does not ruin the dry fly drift.

Soft Hackles and Wet Flies Fit June Water

June is a fine month for soft hackles. They fit the way insects move and fail. A soft hackle can suggest a caddis pupa, a mayfly emerger, a drowned dun, or something alive enough for a trout to chase without requiring a perfect imitation.

Carry a Partridge and Yellow, Partridge and Orange, Hare's Ear soft hackle, Leadwing Coachman, and a few darker wet flies in sizes 12 through 18. Fish them upstream dead-drifted, across and down on a controlled swing, or as a trailing fly behind a dry. When trout are flashing below the surface or rising short to caddis, a soft hackle often finds fish that a dry fly misses.

This is especially useful on the Beaverkill and Willowemoc in riffled water. Let the fly drift naturally first. At the end, let it tighten and lift. Many takes come just as the fly starts to rise, which is exactly what an emerging insect is trying to do.

Streamers: Bring a Few, Not a Brick

June streamer fishing can be excellent when conditions line up, but it is not a reason to carry a winter streamer wallet all day. Bring a small selection and use it at the right time.

Useful June streamers include olive and black Woolly Buggers in sizes 6 through 10, small sculpin patterns, a sparse white or natural baitfish pattern, and one darker pattern for stained water. Fish them early, after rain, under cloud cover, or along shaded structure when flows have enough push to make trout comfortable.

In low, clear, warm water, a streamer often does more harm than good. It can chase fish out of cover, extend fights, and turn a marginal temperature day into a poor catch-and-release decision. If you do throw one, use tippet strong enough to land fish quickly.

Water Temperature Is Part of the Box

A June trout box should include a thermometer, or at least the habit of checking water temperature from a reliable gauge before you leave. New York DEC has warned anglers that trout and salmon can experience physical stress when water temperatures climb above 70 degrees Fahrenheit and recommends avoiding catch-and-release fishing for heat-stressed trout on hot days. Many trout anglers use 68 degrees as a conservative point to stop targeting trout, especially on freestones and for catch-and-release fishing.

That number is not a loophole. If the water is 67 degrees at 8 a.m., the sun is high, and the day is headed for the 80s, you may not have a full trout day. If fish are gathered near a cold tributary or spring seep, leave them alone. They are using thermal refuge, not lining up for sport.

Temperature also changes fly choice. In colder, comfortable June water, trout can feed actively in riffles, chase emergers, and recover well from a quick fight. In marginal water, even if you decide conditions are still acceptable for a short morning window, fish heavier tippet, land trout quickly, keep them wet, and quit before the river tells you twice.

Have a Plan B. Smallmouth bass, panfish, tying flies, scouting access, or fishing a colder tailwater section may be the better move. Good trout fishing includes knowing when not to trout fish.

A One-Box June Layout

If I were building one June Catskills box, I would divide it this way.

First row: sulphur dries and emergers in 14 through 20. This is the working row for the West Branch and for freestone evenings.

Second row: caddis dries and spent caddis in 14 through 18, with tan, olive, and darker bodies. These cover riffles, quick searching, and evenings when fish slash instead of sip.

Third row: large mayflies and spinners. Green Drake duns and Coffin Flies, March Brown and Gray Fox patterns, larger rusty spinners, and a couple of Light Cahills. This row is for windows, not blind faith.

Fourth row: olives, small spinners, and technical flies in 18 through 22. These are easy to forget until the fish demand them.

Fifth row: nymphs and emergers. Pheasant Tails, Hare's Ears, sulphur nymphs, caddis pupa, slim perdigons, and Isonychia nymphs.

Sixth row: soft hackles and a few small streamers. Not many, but enough to cover stained water, riffles, and fish feeding just below the film.

If you organize boxes in the My Custom FlyBox app, June is a good month to build by river and condition rather than just by pattern name. A Beaverkill-Willowemoc June box might put more emphasis on freestone temperatures, caddis, drakes, and evening spinners. A West Branch Delaware June box might give more space to sulphur emergers, olives, fine tippet flies, and low-riding spinners. The flies overlap, but the proportions change.

How to Fish the Box Through the Day

Start the morning with water, not insects. If flows are friendly and temperatures are cool, prospect shaded riffles, pocket edges, and pool heads. A caddis dry, small parachute, or dry-dropper can cover water without committing you too heavily to one hatch. If fish are not willing to rise, use a slim nymph or caddis pupa and keep the rig light enough for the water.

Midday is often the hardest period on freestones. Fish may move into cover, light may flatten the pools, and temperature may climb. This is a good time to check the thermometer, take a break, scout access, or move to colder water. On a tailwater, midday can still produce if releases, clouds, or sulphurs line up, but do not assume. Watch before you wade into the best flat.

Evening is the reason June anglers carry too many flies. Narrow the choices before the light fades. If caddis are active and rises are splashy, start there. If mayflies are on the water and trout are taking softly, try emergers and spinners. If larger bugs appear, resist the urge to immediately tie on the biggest dry in the box. Look for the fish that are actually feeding and match their lane, size, and stage.

When darkness comes, stop changing flies every cast. Pick a fly you can see or track, fish the best drift you can, and leave the pool better than you found it.

Final June Checklist

Before you leave for a June Catskills trout day, pack:

  • Sulphur duns, emergers, cripples, and spinners, sizes 14 to 20.
  • Tan and olive caddis dries, spent caddis, pupa, and soft hackles, sizes 14 to 18.
  • Green Drake, Coffin Fly, March Brown, Gray Fox, and larger spinner patterns, sizes 8 to 14.
  • Blue Wing Olives and small spinners, sizes 18 to 22.
  • Light Cahills and cream evening mayflies, sizes 12 to 16.
  • Pheasant Tails, Hare's Ears, sulphur nymphs, caddis pupa, Isonychia nymphs, and slim small nymphs.
  • A few small streamers for stained water, first light, or cloud cover.
  • Thermometer, floatant, dry shake, 4X through 6X tippet, and enough discipline to quit when the water is too warm.

June rewards anglers who stay flexible. Carry the flies, but do not let the box make the decision for you. Read the gauge. Take the temperature. Watch the rise form. Then choose the fly that fits the water in front of you.

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