By car:
Coming from Paris and from the North: motorway to Granola, then N85 (the Route Napoleon) to Gap, then D900 towards Barcelonnette to Lauzet Ubaye.
Coming from the South via Aix-en-Provence: drive A51 to Tallard then towards Barcelonnette to Lauzet Ubaye.

By plane:
Marseille-Marignane then coach (SCAL, Tel: 04 92 51 06 05) from Marseille or Aix-en-Provence.
Nice airport and then by the route des Grandes Alpes or on "the little tourist train des Pignes"(booking required) Nice-Digne then coach to Barcelonnette with a stop at Lauzet Ubaye.

By train:
TGV Méditerranée, Gare Aix-les-Milles or Marseille + train to Gap then coach to Barcelonnette with a stop at Lauzet Ubaye or hire a car.
Night train Paris-Briançon: change to Gap then take the coach to Barcelonnette.