Catskill and Adirondack streams primed for May caddis and evening rises

What's Biting

What's Next

At 437 cfs, the reading at USGS gauge 01413500 puts Catskills mainstem flows in the moderately elevated range for mid-May — fishable for experienced waders but less than ideal for wade access on lower-gradient pools. Absent additional rain, late-spring runoff patterns typically ease flows a few percent each day through the week. Watch the gauge: once readings drop below the 300–350 cfs range, expect cleaner water in the tail-outs and a measurably better chance of triggering surface activity during the evening Hendrickson and caddis windows.

MidCurrent's Tying Tuesday series has been assembling a useful toolkit for exactly this transition. Their recent "Surface, Film, and Open Water" roundup spotlights patterns spanning every feeding lane — from the Dyret, a buoyant Norwegian attractor that "rides high in fast water and draws aggressive strikes when fish are looking up," to René Harrop's CDC Spent pattern just below the surface film. As flows settle and clarity improves through the week, work a high-floating elk-hair caddis through faster runs while keeping a soft-hackle emerger or pupa on the dropper.

The Grannom caddis (Mother's Day caddis) deserves a slot in the box right now. Caddis Fly (OR) recently highlighted a jigged Grannom Caddis Pupa that "will work fantastic on a euro rig, indicator rig, or a dry-dropper setup" — an approach that translates directly to Catskills tailwater and freestone riffles where caddis emergences typically build in earnest through the second and third weeks of May.

For the weekend: Last Quarter moon means low ambient light overnight and compressed feeding activity around first light and dusk. Plan to be on the water by sunrise and back on again from roughly 5:00 to 7:00 PM. Gauge 01415000's 118 cfs reading suggests the smaller tributary feeders are in good shape for technical upstream dry-fly presentations — brook trout in the upper Adirondack and Catskill tributaries typically become increasingly willing as freestone flows stabilize toward their early-summer baseline.

Context

Mid-May sits squarely in the heart of the traditional Catskills fly-fishing calendar — the stretch between the Hendrickson emergence (typically late April through early May) and the Green Drake hatch (late May into June) that has defined eastern dry-fly traditions for generations. Flows at 437 cfs on USGS gauge 01413500 are consistent with what anglers typically encounter during active snowmelt and spring-rain consolidation; conditions are neither dramatically high nor unusually low for this point in the season.

No direct comparative signal for NY Adirondacks and Catskills streams specifically appears in our feeds this week. The nearest Northeast freshwater benchmark comes from Mainely Fly Fishing (ME), whose early spring 2026 report documented ice-out on Dundee Pond on April 4 — suggesting a moderately normal spring pace for the region, with no evidence of the early warm spells that can push hatch timing significantly ahead of schedule. A normal-paced spring implies the Catskills Hendrickson cycle is likely wrapping, with caddis and March Brown activity now dominant and sulphurs and Green Drakes building toward their late-May peak.

Field & Stream's recent piece on spring stocked-trout fishing echoes a familiar dynamic on these streams: state-stocked rainbows occupy many accessible Catskills reaches through May, providing consistent action for most anglers while wild browns and brookies in more remote sections reward those willing to put in the walk. MidCurrent's coverage of the 5th annual Battenkill Fly Fishing & Arts Festival — alongside an online auction benefiting Battenkill stream restoration — is a broader reminder that conservation investment in Northeast trout habitat continues to be a priority across the region. For the sharpest local read before your trip, check DEC stocking schedules and call a Catskills-area tackle shop for the most current stretch-by-stretch intel.