From the exposed rock dome at the top, head down to the southwest - watch for trail name signs, since there are a number of other runs starting near this same spot. The track begins with some generally steep wooded singletrack and a few rocky drops, before you come to the first of several very steep (near vertical) bedrock 'roll-downs' (depends on how you ride them).
There are several trail crossings along this route, so keep your head up and watch for the trail name signs. The first big bedrock descent is perhaps roughly 12' down. The subsequent big ones might be more like 15' from crest to bottom. As the track continues, several more steep drops are encountered. There is a short break in the descent about 3/4 of the way down, where you're crossing a flatter sort of plateau, as well as Skyline trail again. Just afterwards, you'll start the final short, but very gnarly rock-riddled descent to the paved road (Skyline Parkway).