Hi and welcome to West PA and Pittsburgh.
Living and fishing around is a bit different than CA or CO but you will find the way to enjoy the fly-fishing around. PAFLYFISH is a good start with many hot links and worth all of your time.
There is Penn’s Woods West – Trout Unlimited with meetings every Monday, local friendly anglers, gathering promptly in Pittsburgh at Rt51 and Marylea Ave; they organize in February Cabin Fever - fly-fishing expo located north of PGH.
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Pennsylvania
Fly Fishing Museum Association in Central PA, with legendary anglers and writers still active and eager to chase trout.
International Angler place in Pittsburgh where you can find fishing gear and all goodies you need to fish and fly fish, very friendly staff, the shop organize fly fishing trips including Patagonia, New Zeeland and more, they bring fly fishing film festival to Pittsburgh and screen it at Oakland Theater in the spring.
Kathy, you will find in W PA small 5 inch Brookies, giant Lbs. steelhead in Erie tribs and almost everything between.
Get yourself books like; “Trout of Streams of Pennsylvania” by Dwight Landis, Fly Fisher’s Guide to Pennsylvania by Dave Wolf or steelhead guide by John Nagy and you will be THE expert in no time.