Stage 4 La Chapelle-d'Armentières - Cassel (172.7km)
The penultimate stage to Cassel is, as always, decisive for the general classification. On the cobblestone-covered slopes of Mont Cassel - also known as the Rue de Tambour - the battle for the final victory will ignite. The finish line is drawn on the steep side of Mont Cassel (1 km at 8.8%).
| Date | Saturday 17 May |
| Start |  La Chapelle-d'Armentières |
| Finish | Cassel |
| Distance | 172.7 km |
| Elevation gain | 2406 m |
| Start time | 12:00 |
| Expected finish | 16:21 |
Stage 4 La Chapelle-d'Armentières - Cassel (172.7km)
The penultimate stage to Cassel is, as always, decisive for the general classification. On the cobblestone-covered slopes of Mont Cassel - also known as the Rue de Tambour - the battle for the final victory will ignite. The finish line is drawn on the steep side of Mont Cassel (1 km at 8.8%).