Tell us everything there is to know about Birdsboro Nature Preserve????
Lots of fun trails and most of them are mapped on Trailforks. I prefer to park at the Cocalico trailhead. BB has been gaining a lot of traction lately among the locals and is being ridden pretty much. The terrain is similar to French Creek but the trails are much more gravity/fun focused. A few of the locals have been planning out a 6-pack enduro race there, but I'm not sure exactly when it'll be happening.
You can have a good time going in blind, but you'll have much better time if you ride it with someone that knows the area. I live about 5 minutes away and ride there fairly often so if you'd like a tour I'd be happy to show you around. Feel free to message me if you'd like to work something out.