We start either at Preiner Gscheid or from Gasthaus Moassa (access possible Wednesday to Sunday; an excellent excursion inn), and follow well-marked trails: from Preiner Gscheid via the yellow-marked Reissthalersteig and, shortly after the unstaffed Reissthalerhütte, along the red-marked trail toward Fuchsloch; or from GH Moassa via the red-marked Fuchslochsteig — all the way to the base of the Raxenmäuer.
At the signposts (entry to Großes Fuchsloch), we do not follow the marked Fuchslochsteig straight ahead, but instead head right and upward, eastward, into a large cirque. At the base of the wall is a red survey mark with the number 25. Further up to the right, a slab-like rock formation becomes visible (some faded trail markings can still be seen). This slab formation marks the continuation of the route.
Pleasant and easy climbing leads us upward into another wide cirque. Always keep slightly to the right, ascending over several rock steps to reach a broad, grassy ridge.
From here, veer slightly left and soon reach the high plateau (often still snow-covered well into summer).
To the left of the snowfield, the route leads almost directly to the summit: Heukuppe (featuring a large monument; the actual summit lies a few meters further west, at 2,007 m).
From the summit, there are several descent options: either via the secured Reissthalersteig, the also secured Gretchensteig, or the broad Schlangenweg back to Preiner Gscheid. If your car is parked at GH Moassa, you can return via the easy Altenbergersteig.
Descending via the Großes Fuchsloch is not recommended.