The Trois Vallées steam railway (in Mariembourg and Treignes)

  • Enjoy a travel through time aboard the authentic steam train in the three valleys, between Mariembourg and Treignes
Some tourist attractions have reopened to the public.

Please check the opening times, booking tips and recommendations with them (either via their website or by contacting them directly) before visiting. Remember to check the border and quarantine regulations before travelling.
Click here to see the list of attractions now reopened.
  • Classification officielle d'une attraction en Wallonie : 4 soleils
  • Train/tram/tourist train
  • Adventure sports

Enjoy a travel through time aboard this authentic steam train, a wonderful way to discover the Viroin and Haute-Meuse valleys in Wallonia.

The steam railway of the three valleys or CFV3V goes from Mariembourg to Treignes, via  Nismes, Olloy-sur-Viroin and Vierves, the latter being listed as one of the prettiest villages in Wallonia. You are sure to fall under the charm of the picturesque landscapes along the way.

You can learn more about this network, famous in Europe for its beauty at the Musée du Chemin de Fer à Vapeur des Trois Vallées.



Special events to put in your agenda

  • February: Valentine's day train, booking required
  • April: Easter train
  • June: BBQ train, booking required
  • July: model trains day
  • August: terroir products market
  • September: terroir products train (booking required), steam fest
  • October: Halloween train
  • December: Christmas train

Details and exact dates can be found on the official website.

Visitors with specific needs

Please click here to see the list of facilities and activities accessible to visitors with reduced mobility. Wallonia has developed the Access-i program to give travellers a clear understanding of what the infrastructures offer.

Please note, on this site:

  • If you have a wheelchair: a specially equipped coach awaits on our steam train.




  • Animation


  • Access for PRM (autodeclared)
  • Car parking
  • Cycle rack
  • Parking


    Pets allowed
    The information provided is an indication only. We advise you to inquire directly with the organisers of the event that interests you before you leave.