Hey op, I forage a ton of mushrooms around pittsburgh. If you want to find them, you have to find old stands of oak. From early june to october, they will produce several types of edible mushrooms.

Deer lakes and Frick are where I recommend. You can also easily pick oysters, chanterelles, and hen of the woods around oaks.

Timing is key in Pittsburgh. I find em when they are just starting and watch em for a week or so before I pick. They get buggy if it's a dry year and moldy if it's a wet year.

You can also pick morels in Pittsburgh. But again, you have to know what trees and what time to look. Target ash, dying elm, apple, and living tulip poplar between end of April to mid may.

Also the bane of mushroom season is poison ivy and ticks. Watch where you pick and be smart.

Also, I wouldn't pick anywhere that treats soil or has been mined. Mushrooms are like sponges so while people pick in the yard of Allegheny national cemetery, I wouldn't recommend it.

Feel free to dm me if you have specific questions. Good luck and happy hunting.