With a good basic condition, the hike is easy to manage. In any case, the magnificent view rewarded, and the proximity to Ellmauer Tor for the drops of sweat. Of the Gruttenhütte itself I can unfortunately not give a judgment, as it is currently being renovated. But a small snack on one of the outdoor benches with a gigantic view is more than appealing. However, if you are offensive, you should have your eyes everywhere, because the mountain jackdaws are right there.
There are two ways starting from the Wochenbrunnalm, the direct in 1,5 hours, I think one should have a good basic condition here and be firm and the second way over the stone circle, ie the entrance at the end of the parking lot. If you do not know exactly which route then ask.
A beautiful track with very impressive pictures that I will carry in me for a long time .....