We'll have one day for this, in August. Would probably like to take a cable car /chairlift up and then either walk around a circular route or take a scenic route back down. Could be about 4 hrs max.
As far as I can see there are two areas where this would be possible: west - Pradalarga lift area; and east - Groste area. I have the impression that the western area might be better as regards variety and presence of ski runs?
Would rather avoid walking in areas where there are a lot of ski runs, if possible. Lakes might be nice, and sightings of marmots appreciated :-) But a varied walk if possible, with a bit of everything.