Monts-Jura is advertised as one ski area; the 3 alpine areas are far apart with no links. The skibus service that used to exist between the areas has been stopped. Monts-Jura is therefore three completely separate small areas, even though you have no choice but to buy a skipass that covers all 3. We stayed almost all the time at Mijoux. It's ideal for beginners and lower-intermediates. We stayed mostly at Mijoux. All the reds at Mijoux are easy. The solitary very short black is tricky as is the off-piste descent back to Mijoux if you go straight down rather than following the long winding blue. Snow conditions when we were there were better than we expected from the snow report and the views to Geneva and the Alps are stunning. It's a very pretty place to ski.