La Chavanette
France
Le Pas de Chavanette, also known as the "Mur Suisse" or "Swiss Wall", is a particularly steep and difficult piste in the Portes du Soleil ski area, on the border between France and Switzerland. It can be reached from the French resort of Avoriaz and from the Swiss towns of Les Crosets and Champéry. Effectively, one starts the run standing on the Swiss-French border, plunging down the Swiss side of the mountain towards Les Crosets.
Data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).