The road turns south east through the Foret de Sourdun (167 m) and then into the valley of the river Seine.

The N19 heads south east out of the town past the A26 and round the bottom of the Parc Naturale Regional de la Foret d'Orient.

The road heads south east along the south bank of the Upper Marne Valley through the Bois de la Vendue and crosses the A31 autoroute and enters a small plain surrounded by hills of over 475 m. The road then enters the walled hill town of Langres.

Langres occupies an important defensive position from the east and the Franche-Comté there are views from the ramparts to the Alps.

The N19 heads east past the Lac de la Liez and then climbs the surrounding hills to 409m.

After Lure through traffic now takes the D438 to the south while the N19 heads north past Ronchamp, the Bois de la Nannire and Foret du Cherimont into the fortress town of Belfort.

At Sevenans it turns south east over the river Bourbeuse to the town of Delle on the frontier with Switzerland.

The link is being improved to the south of Delle with a dual carriageway to meet the Swiss autoroute A16 currently being constructed.