Brass Balls isn't really a trail it is actually a fun little rock face. It is really easy, but the thing is when you fuck up, you fuck up bad. Anyway, the trail that I think you guys are talking about, with the five foot drops, is actually called rock trail. It is a fun trail with some technical drops. At the end of rock trail is the legendary Brass Balls.
Lets get a few things straight.
The two sets of woods can be connected by the streets via Common Lane. Excellent riding for intermediate to advanced riders. Be prepared to get muddy and wet in the spring. Theres alot more technical and altitude intensive terrain outside of your neighborhood. A few downhills that most people will have to walk because they are soooo steep.