Near the back of the Bisistal, opposite the wide grazing area of ​​the Ruosalp, lies the south wall of the Alpler Stock, well hidden and hardly known. In addition to an older, classic south-wall route that leads to its summit, there is a handful of sport climbing routes of 1-5 pitches, which were equipped around 1995.

The Alpler Stock sits at the end of the Alpler Flue, a good kilometre long rock barrier. This consists of numerous smaller and larger, 50 - 200 m high rock formations, which are separated by deep clefts. Above the Alpler Flue, are again gentle slopes used for grazing, over which you can comfortably descend on foot from the four longest routes on the central wall, via pass Ober Stafel, to reach the valley floor.

From 2012 to 2015, 30 routes from 1 to 7 SL were drilled in 6 different sectors on the Alpler Flue. They mostly have a 'climbing garden' character but, depending on the route (as well as their length) some can feel a bit alpine in character. For most routes, near-vertical climbing dominates. The horizontally layered limestone has the characteristics typical of the rock in the Klausen Pass area and is comparable to that on the neighboring Glatten. It is mainly solid and grippy. However, one or two routes also cross zones of somewhat chossier/ less reliable rock. Since the Alpler Flue is highly structured, the belays are usually comfy. However, there are often loose rocks poised on the ledges, so exercise caution with regards to rockfall, and #HelmetUp!