Did this as part of a section hike of the AT with my wife, where we were finishing up Maryland. We stayed the night at the new Raven Rock shelter which is very close to the turn-off for Devils Racecourse. We checked out Devils Racecourse the next morning and it is a neat spot.
I started at 77 and climbed Buzzard Knob on the way. When I reached the blue spur trail, I scrambled and bushwhacked north all the way to the highest of the rocks, then made my way back down to enjoy the views from the outcrop at the southern end (just north of 491). So, I learned that the best views and climbing opportunities are down there - not at the high point.