The normal way up to La Plagne is to start in Aime (656m). The road I have drawn (but likely not followed myself) is a short-cut up through Mâcot, but higher up there is only one way to go. It is a long climb, never particularly steep. Above Plagne 1800 you get a choice where you take right up to Plagne-Centre and at the next turnabout you take left up to Plagne-Villages where the road ends at a parking place, but at the upper end you see a small road which should be good asphalt (maybe it was a little bad the first few metres) that goes to La Fruitière (cheese shop) (2138m).

There is a sign for La Fruitière just a bit further up, where the climbing stops, but the road was bad up the last part here with road works and rain when I was there. However, I pushed on up to Col de la Grande Forcle 1.69 km up from the cheese shop and another 127 height metres. This road is partly asphalted and has a long steep ramp up to the pass made easier by the bad asphalt.

If coming down from Col du Tra (1308m) (a nice little pass for the many serpentines up from Moûtiers), you start the climb in Bonnegard (721m). If coming down from Bourg d’Oisans and some of the famous passes here, you likely start in Bellentre (722m).