FATMAP difficulty grade
Make no mistake about it - this is a beast of a day and takes you through some remote and untamed mountains.
As if the toughness of the terrain wasn't enough, it also has some logistical issues because it's linear and therefore requires a vehicle shuttle or drop-off.
The payoff for overcoming the challenges is having one of the best and most adventurous hiking days you'll find anywhere in the Alps. The day starts with a bit of a slog up the road in the lower section of the Halltal from Absam village, and although it's possible to get on and off this a couple of times and get yourself onto some sections of path, the fastest way to get it done is to stick on the road. Follow the road all the way up to and then past the St Magdalena hut and then take the right hand valley as the Halltal splits.
Follow a small path through some dense forests and then climb up to the stunning Lafatscher Joch col (a contender for the most scenic col accessible from Innsbruck) and soak in the epic mountain vistas all around. Drop off the back of the Lafatscher Joch and descend down to the Hallerangerhaus via a rocky path and then a scree-filled gully.
The Hallerangerhaus is open in the summer and provides an extraordinary view across the nearby peaks.
If you're passing here when the hut is open, stock up on calories and then wave goodbye to humans for a while - you're very unlikely to see any for a few hours! Climb up to the wide col east of the Hallerangerhaus and then follow a small trail which leads down alongside the Vomperbach river into a spectacular and desolate valley sandwiched between the Grubenkarspitze and Großer Bettelwurf peaks.
The trail becomes increasingly vague as it drops down to the valley bottom and flattens out.
At some stages a good nose of route finding is required which - along with the remoteness and exposed scrambling on the Knappensteig - make this firmly a route for experienced mountaineers. After following the valley floor for a while, the trail turns right, heads uphill and the Knappensteig proper begins.
The "trail" (if we're being generous with the term) climbs up broken slabs and across exposed ledges.
At times the trail is clear but at other times you'll really need to sniff out the optimal route for yourself, following the occasional paint mark and a lot of intuition.
As the trail gets closer to the Walder Alm it gets increasingly clear, and it eventually becomes obvious that the toughest terrain lies behind you.
Stroll triumphantly to Walder Alm and then, 20 minutes later, the Hinterhorn Alm, where a well deserved beer awaits!