FATMAP difficulty grade
This is a really spectacular route here in Hintertux, but it's only possible with really good weather conditions and a safe avalanche report.
You also need a lot snow, to avoid slipping into crevasses at the beginning, where you go over a glacier.
Since you are on a glacier so make sure you are equipped, prepared and have practised crevasse rescue, however unlikely you think falling in a crevasse is- it is possible! A minimum would be axe, crampons, an ice screw, a 30m rope, prussiks, several screwgates, a pulley and a couple of slings.
A more modern simple solution might be a Petzl RAD system.
If you have any doubts about this ski with an IFMGA Mountain Guide.
The line starts on top of the 10er Gefrorene Wand gondola.
You need to go to the left when you exit the top station.
First of all you need to shift over a flat part for 250 metres, after which a wide hill appears, which is turns to the right and is gets steeper and steeper.
It is leads next a big rock face on the right for 700 metres to the bottom of the Kleegrube valley.
When going down here keep a safety gap between each other and be aware of the rocks and cliffs close to you - you are on glacier ice here after all.
The best first meeting spot is down at the bottom of the valley, after you've been to the steep channel here.
When you arrive here it gets flat again, and the valley leads out for about 1 kilometre of 30 degree terrain.
Enjoy the last wide turns here then try to stay now more on the left side of the valley and gain some speed, because the last part is really flat and you need to get over a few small hilltops.
Here it is useful not to be the first because then you need to create the track all the way out to the end.
In the last few metres the hill gets steeper and turns to the right and here you need to cross to the left until you reach the Spannagelabfahrt slope. This is for sure the most spectacular route in Hintertux, but it requires a lot snow because of the crevasses, but also because of the rocks down in the valley.
Here you need really good weather and avalanche conditions!