the more "technical" top section is easier to find on the push up IMO.
on the way back up, when you cross over the little road, you'll be pushing up a nice wee rocky chute, then it opens up onto a large, wide cobbled road which swings up to the left.
Walk about 20m up this cobbled section and you'll see the more technical trail to your right, take that path (i think it actually has a trail marker).
Push all the way up until you hit the wall at the main road, turn around and ride back down. It can be pretty interesting if it's been raining heavily though
It's much slower than the other top section, so if you want to do lots of fast runs, just follow the main trail up to the main road, turn around and ride down. But the more technical top bit does make it more interesting and last longer.
There's a cracking drop called "don't look down" if you are into dropping off man made features from great heights. It's tougher than it looks in the videos if you hit it quickly. Avoid if it's wet (bye bye front wheel!).