There was quite some fuss a few weeks ago about a company called Travelski claiming to run a night train Paris to the Alps ⛰ for skiiers, and from the coming season https://www.travelski.com/travelski-night-express

But I can find no evidence HOW they can do this, so I made a #BullshitMeter for it

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Partez au ski sans stress et profitez jusqu'à 8 jours de ski avec notre offre Travelski Night Express. Offre : Train de nuit + Hébergement + Forfait + Matériel inclus !

@jon a friend of mine literally did a Paris-Briançon night train this winter, so they kinda already exist?
@pierrotechnique To Briançon, yes. This claims to be Bourg St Maurice, and private, in a package. Basically: there are no night trains to the main resorts in the Alps from Paris, only TGVs.
@jon kinda makes sense though, most of the Northern Alps are relatively accessible from Paris. night trains only really make sense once you have to get to the other side of the Écrins
@pierrotechnique Yes, I agree with that. A night train from somewhere Benelux or Lille to Bourg St Maurice would be a better bet I think, although harder to operate of course.