The GR 57 or Vallée de l'Ourthe et Sentier du nord is a GR footpath between Belgium and Luxembourg. About 265 km long, it goes through four regions:

• The city and surroundings of Liège
• The valley of the Ourthe
• The Sûre and the basin of the Rhine
• The Oesling and Gutland

Veille Foulerie (Barchon), Jupille, Liège, Angleur, Tilff, Esneux, Comblain-au-Pont, Durbuy, Hotton, La Roche-en-Ardenne, Houffalize, Gouvy, Troisvierges, Clervaux, Kautenbach, Lipperscheid, Diekirch.

• https://web.archive.org/web/20050404182428/http://www.groteroutepaden.be/grlf/gr/routes/gr57.htm (in Dutch)
• Les Sentiers de Grande Randonnée, GR57 (in French)