Free Resource · Updated 2026

Penn's Creek Fly Hatch Chart

Month-by-month hatch timing and fly pattern recommendations for Penn's Creek in 2026. Pennsylvania's premier limestone spring creek with one of the greatest Green Drake hatches in the eastern United States. Wild brown trout, technical fishing, and a full hatch calendar from April through October.

Wild Brown Trout Limestone Spring Creek Centre & Mifflin County, PA Current Month Highlighted

About Penn's Creek

Penn's Creek flows 70 miles through Centre and Mifflin counties, fed by massive limestone springs that keep water temperatures stable year-round. That stability is why hatches here run 1 to 2 weeks ahead of freestone streams in the same region.

The stream holds self-sustaining wild brown trout and is designated Class A wild trout water through most of its length. Fish are selective and well-educated. Fine tippet and drag-free presentations are standard practice.

The Green Drake hatch in late May and early June draws anglers from across the country. Large creamy duns blanket the water at dusk, triggering aggressive surface feeding from big browns. The White Fly hatch in August is a second major event worth planning around. Sulphurs carry evening fishing from May through July.

See the full Pennsylvania Fly Hatch Chart for hatch timing across all of Pennsylvania's top trout streams.

Check Conditions Near Penn's Creek

What to Fish

Penn's Creek Key Hatches

Green Drake

Late May to Early June

Ephemera guttulata

Pennsylvania's marquee hatch event. Dense dusk hatches of large creamy duns when water temps reach 55 to 62 degrees. Draws anglers from across the country for a window that typically lasts 2 to 3 weeks around Memorial Day.

Recommended: Coffin Fly, Comparadun Drake #8-10

Hendrickson

Mid to Late April

Ephemerella subvaria

The first major dry fly event of the Pennsylvania season. Afternoon hatches fire when water temps climb into the mid-40s on sunny April days. Limestone spring temps mean Penn's Creek runs 1 to 2 weeks ahead of freestone streams.

Recommended: Comparadun, Parachute Adams #12-14

Sulphur

May through July

Ephemerella dorothea

Pennsylvania's most reliable evening hatch. Fires around 7pm and intensifies at dusk from late May through July. Fish become selective in flat water. 5X minimum, 6X for educated fish in slow glides.

Recommended: Sparkle Dun, Parachute Adams #16-18

White Fly

Mid to Late August

Ephoron leukon

A late summer spectacle unique to a handful of PA rivers. Massive evening hatches blanket the water at dusk and trout feed in a frenzy. The window is short and intense. Best in the 30 minutes before dark and continuing after with a headlamp.

Recommended: White Wulff, Comparadun #14