 The road heads south east next to the Canal de la Marne à Saône and heads into Saint Dizier which lies on the River Marne between the "Forêt de la Haie Renaut" and the "Forêt du Val" with the RN 67 branching south along the Marne valley.The RN 4 heads East up out of the valley climbing to 350 m in much steeper countryside which is also more wooded.The road then passes through the "Forêt de Ligny" before entering Ligny-en-Barrois itself in the River Ornain valley crossing the Canal du Rhein.