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New York · Adirondacks & Catskills trout streamsfreshwater· 13h ago · Updated June 7, 2026

Green Drakes emerging on Catskills streams as flows drop to summer lows

Morning flow readings from two USGS gauges confirm the Catskills have shifted into summer-low mode. The Beaverkill at Cooks Falls (USGS gauge 01415000) measured 11.2 cfs at 6:45 a.m. on June 7 — well below the seasonal median — while the East Branch Delaware at Margaretville (USGS gauge 01413500) registered 69.1 cfs. Neither station reported water temperature. Despite thin, gin-clear conditions, timing favors the fly angler: Flylords Mag this week highlighted the Green Drake hatch in full swing, noting that brook trout fed actively on the duns through an afternoon session. MidCurrent's latest Tying Tuesday spotlighted surface and film presentations suited for exactly these opening hatch windows across Northeast freestone streams. Low water calls for a disciplined approach — long leaders, fine tippets, and minimal wading disturbance. Focus on pool heads and tailouts where oxygenation is highest and trout stage when flows run this thin.

Current Conditions

Moon
Last Quarter
Tide / flow
Beaverkill at Cooks Falls (USGS gauge 01415000): 11.2 cfs; East Branch Delaware at Margaretville (USGS gauge 01413500): 69.1 cfs — both running well below typical early-June levels, flows are low and clear.
Weather
Check local forecast before heading out

New to these readings? What do water temp, cfs, tide, and moon phase actually mean for fishing?

What's Biting

Active

Brown Trout

Green Drake duns and CDC emergers during midday to late-afternoon hatch windows

Active

Brook Trout

dry flies in shaded tributaries during afternoon hatch activity

Slow

Rainbow Trout

deep nymphing with weighted flies in the slowest, deepest pools

What's Next

With the Beaverkill sitting at 11.2 cfs and the East Branch Delaware at 69.1 cfs, expect conditions to hold low and clear through the coming days absent meaningful upstream rainfall. These flows consolidate trout into the deepest, best-oxygenated pools, which raises both the technical difficulty of the approach and the potential reward when a fish is found and properly presented to.

The prime window for the next several days is midday through early evening. Green Drake emergences on Catskills freestone streams typically crest between 1:00 and 5:00 p.m. in early June, with spinner falls arriving 30 to 60 minutes later as temperatures ease toward dusk. Overcast skies push emergence earlier and sustain it longer — worth checking the forecast each morning before committing to a session time. Flylords Mag confirmed brook trout keying hard on the duns during afternoon hours; that same feeding trigger applies to the wild browns holding in the famous Catskills pools when the hatch is running.

The Last Quarter moon reduces low-light illumination at both ends of the day, narrowing the window for early-morning streamer work and shifting the productive action squarely into hatch-driven surface feeding. That is a net advantage for the angler prepared to post up on a known pool and wait rather than covering water at dawn. MidCurrent's recent pattern roundup covered the full water-column toolkit for exactly this phase: attractor dries that ride high in fast current, CDC emergers in the film for fish working the surface from below, and nymphs for the inevitable subsurface feeders during the lulls between hatches.

On the East Branch Delaware, 69.1 cfs provides enough current diversity to fish productively throughout the day. The larger pools hold the best wild brown trout in the drainage, and evening Sulphur spinner falls often complement the Green Drake action through mid-June. Weekend anglers targeting the East Branch should set up on a productive pool before 4:00 p.m. and commit through the spinner fall rather than jumping between runs.

In both drainages, approach is everything at current flows. Long leaders — 12 to 14 feet — and 6X tippet are the minimum for daytime dries. For anyone nymphing between hatches, Gink and Gasoline's standing advice applies: add more weight than feels right, then add a little more. A dead-drift fly that does not tick bottom in slow, clear water rarely draws a strike.

Context

Early June is historically the peak of the Catskills hatch calendar, and on that front 2026 is running on schedule — Green Drakes and Sulphurs are the most celebrated emergences on these storied freestone streams, and Flylords Mag's Green Drake coverage confirms the hatch is active. What is not typical is the volume of water carrying those hatches. The Beaverkill's 11.2 cfs reading stands well below what most Catskills guides and regulars consider fishable comfort in the Green Drake window; in most June seasons, Beaverkill flows run 50 cfs or higher through this period, spreading fish across riffles and holding runs rather than consolidating them into the handful of deepest pools.

Hatch Magazine's recent piece on fishing through drought conditions offers a useful frame for what Catskills anglers are navigating right now. Though written about Colorado's Front Range freestone streams, its core lesson transfers directly: in low, clear, warm-trending water, presentation discipline and observation time matter more than fly selection. Walk more water, cast less. Get lower before the first false cast. The fish are there; they are simply far easier to spook.

For Adirondack-bound anglers, the picture differs somewhat. Headwater brook trout streams in the Adirondacks run cold and clear by nature, and many of the best wild brook trout water holds fish reliably through June and into July at flows that would leave Catskills browns stranded on riffles. Trout Unlimited's current coverage of brook trout — noting that these fish inspire "out-sized passion and awe" and serve as state fish across nine eastern states — is a good reminder that the northern tier offers a genuinely different fishery right now. For anglers who find the pressured Catskills pools technically demanding in low water, a walk-in Adirondack tributary on a June morning can be one of the more rewarding freshwater experiences in the Northeast.

No direct comparative flow records for prior-season June readings are available in today's data feed to quantify precisely how far below average 2026 stands, but the gauge values alone point to a drier-than-normal late spring across the watershed.

This report is synthesized by Hooked Fisherman from real-time NOAA buoy data, USGS stream gauges, and current reports across regional fishing blogs, captain updates, and angler forums. Source names are cited inline where they appear. Check local regulations before keeping fish. Never trust a single source for a trip decision.