By train from Visp or Lausanne to Sierre/Siders. From there, it’s around 10 mins on the funicular to Montana. Continue from the funicular mountain station on bus No. 421 or 422 to the «Pavillon» stop which is almost outside the front door of the youth hostel. In winter, another bus which also stops just 100 metres from the youth hostel, takes you to the valley stations.
The youth hostel has a limited number of chargeable car parking spaces, for which advance reservation is recommended.