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Pennsylvania Hatch Chart

Published by Dave Kile [dkile] on 04/15/2019 (209925 reads)
Pennsylvania Hatch Chart

This is a brief list of the many thousands of hatches that are found across Pennsylvania.  All dates and time are approximations.  Sun, clouds, rain, and temperatures can have a wide range of effects on the timing of all hatches.  The first occurrence of most hatches generally start in the southern part of the state and then work there way north.

Hatch Common Name Hook Size Start Date Start time Latin Name
Little Blue Winged Olive 16-20 15-Mar 10:00 AM - 4:00 PM Ephemerella & Baetis
Blue Quill 16-18 17-Apr 11:30 AM - 3:00 PM Paraleptophlebia adoptiva
Quill Gordon 12-14 17-Apr 1:30 PM - 6:30 PM Epeorus pleuralis
Hendrickson Female 12 19-Apr 2:00 PM - 6:30 PM Ephemerella subvaria
Red Quill Male 14 19-Apr 2:00 PM - 6:30 PM Ephemerella subvaria
Sulphurs 14-16 10-May 7:00 PM Ephemerella rotunda, dorthea, & others
March Brown 10-12 12-May All Day Stenonema vicarium
Gray Fox 10-12 12-May 10:00AM - Noon Stenonema fuscum
Light Cahill 14 18-May 8:00 PM Stenacron
Blue Winged Olive 14-18 20-May 10:00 AM - 3:00 PM Baetidae
Green Drake 8-10 24-May 8:00 PM Ephemera guttulata
Brown Drake 10-14 26-May 8:00 PM Ephemera simulans
Slate Drake 12-14 26-May 5:00 PM Isonychia bicolor & sadleri
Trico 20-24 15-Jul 7:00 AM -Noon Tricorythodes stygiatus
White Fly 10-14 Early August 7:30 PM Ephoron lekon
Slate Drake 12-14 August-October Noon - 4:00 PM Isonychia

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Author Thread
Published: 2016/8/15 21:44  Updated: 2016/8/15 21:44
Joined: 09/06/2013
Comments: 4
 Dream stream, advice needed
Puzzled Scenario: Small spring stream in south eastern region, crystal clear most of the time. Width about 12' to 4', cascading pools, woodland. Very little if any fishing pressure. There are very large wild browns and the size of the fish are truely unbelievable. I have been an avid, borderline obsessive fly fisherman for 40 years now specifically for wild trout, and have never seen anything quite like this stream. I caught several 16" to 18" and some smaller in large holes and started to see the big fish in deeper pockets and even in little 3' riffles. Needless to say, I have put quite an effort into connecting with the big guys. I have had several hook ups but the line was broken, and quite possibly cut off. I have fished the stream two to three times a week with one particular hole with 4 or 5 dream browns holding there. I have had the medium trout smash elk hair caddis earlier in the season, as well as sown success with haresear #16's. Since the. The stream has rejected my best offerings. I have tried everything: caddis larvae, emergers, dries. Royal wulff with a prince dropper, groffitjs gnat, foam hoppers with droppers including prince nymphs, haresears, micro mayflies, woolies, stimulators, zebra midge, small foam beetles, lots of small nymphs. I changed my fly line to a natural color and switched to a 13' leader 6x with dark color and 2lb tippet. I tried bead heads and non bead heads. Needless to say, I am looking for sound advice and suggestions. Thanks for your time and any advice would be appreciated! Fred
Published: 2016/9/8 8:29  Updated: 2016/9/8 8:29
Joined: 08/10/2013
From: Geigertown, PA
Comments: 164
Wait until it rains really heavy and try the buggers again. I'm in a similar situation, and I have had success with the bigger browns when it really rains good and I use the fly that imitated the natural baitfish in the stream.
Published: 2017/1/24 20:33  Updated: 2017/1/24 20:33
Joined: 05/03/2012
From: United States
Comments: 2
 Spring Fever
It's been a pretty mild winter so far in SW Pa . I've been restocking my fly boxes the last 4/5 weeks. I'm dreaming about Trout! Lol

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