Circuito de senderismo de 280.75 km desde Obies. El desnivel positivo es de 3805 m, con una altitud entre 90 m y 264 m. Duración estimada: 90 h 30 min. Municipio de salida: Obies (Hauts-de-France, France).
Esta ruta incluye 17 subidas significativas. Con un desnivel acumulado de 1960 m a lo largo de 70.14 km, con una pendiente media del 2.8%.
- Climb 1 (at km 35.13 km): +174 m over 9.14 km, average slope 1.9%
- Climb 2 (at km 43.88 km): +89 m over 2.65 km, average slope 3.4%
- Climb 3 (at km 185.63 km): +443 m over 18.97 km, average slope 2.3%
- Climb 4 (at km 193.37 km): +110 m over 3.77 km, average slope 2.9%
- Climb 5 (at km 203.54 km): +51 m over 1.79 km, average slope 2.8%
- Climb 6 (at km 207.11 km): +32 m over 621 m, average slope 5.2%
- Climb 7 (at km 212.71 km): +55 m over 1.66 km, average slope 3.3%
- Climb 8 (at km 239.65 km): +93 m over 3.15 km, average slope 3.0%
- Climb 9 (at km 289.76 km): +138 m over 5.17 km, average slope 2.7%
- Climb 10 (at km 309.31 km): +77 m over 3.53 km, average slope 2.2%
- Climb 11 (at km 354.90 km): +220 m over 7.86 km, average slope 2.8%
- Climb 12 (at km 362.87 km): +39 m over 900 m, average slope 4.3%
- Climb 13 (at km 372.10 km): +164 m over 3.88 km, average slope 4.2%
- Climb 14 (at km 390.98 km): +48 m over 1.73 km, average slope 2.8%
- Climb 15 (at km 398.39 km): +97 m over 1.85 km, average slope 5.3%
- Climb 16 (at km 407.66 km): +66 m over 1.16 km, average slope 5.7%
- Climb 17 (at km 420.39 km): +64 m over 2.29 km, average slope 2.8%
