This walk runs along both sides of the banks of the Ill, Alsace's main river (238 km), which rises in Winkel (Alsatian Jura) and flows into the Rhine north of Strasbourg after passing through the Sundgau, Mulhouse, Colmar and Selestat. Departure is from the Passerelle de l'Ill on the west side, near the Maison des berges.