A view from Reperdalsåsen

Is this stone a cairn? Or is it naturally standing there? I encircled the valley of Reperdalen nature reserve and as I reached the top of the mountain I lost the path. I invariably followed vague sheep trails and looked for signs that might mark the continuation of the path. This stone was quite prominent so I headed towards it. alas it didn't seem like it was actually marking the path and I ended up finding my way for the last bit by striding out over grassy hillocks and mossy marshes. I was nervous about the sheep at various points in the walk as they seemed to have a tendency to run after me.