Yes, I'm actually a bit east of Pgh in the Irwin area. Most of the places I'm aware of are for mud-bogging for big lifted machines unfortunately. My wife and I spend our time trying to find good trails, but due to our 70 hour work weeks, are barely able to get out once a month. Most of our travels take us east in to the Laurel Highlands (straight out Rte 30) and we attempt to get lost from there. We did find a fantastic bit of trails south of the city, we spent hours driving back and exploring...but I'd have to find it again. When I can dig up where that was I'll let you know, it was an odd dirt road that started at the end of a residential street and ran along a small river. I actually traded my seriously built off-road jeep to get more into overland-exploration style trips and am now building my jeep as such. Sounds like you and I are looking for the same type of trails and should keep in contact.