There are numerous ways to climb the mountain. The lift being the easiest, though most senseless option as you miss out of some views along the way. Speaking of the way, it is by far not as diverse or interesting you may expect from such a famous hiking trail. The main path mainly follows a ski slope that turns out to be a paved road in summer. Not very comfortable to walk as you can image.
The top offers some nice views over the Chiemsee and the Alps.
The last bit - just after the Steinlingalm - requires some little scrambling over rocks and through some decent cave-like narrow alleys.
The gigantic summit cross is enormous and even has solar powered lights on it.