Col du Portillon
The Col du Portillon is a mountain pass in the Pyrenees on the border between France and Spain. It connects Bagnères-de-Luchon in France with Bossòst in the Val d'Aran,
Spain.
Details of climb
Starting from Bossòst, the climb is long. Over this distance, the climb is at an average of 6.8%. The steepest section is at 8.2%, from the summit.Starting from Bagnères-de-Luchon, the climb is long. Over this distance, the climb is at an average of 6.5%. The final is at an average gradient of 8.4%, with the steepest section being at 14%.
Appearances in Tour de France
The Col du Portillon was first used in the Tour de France in 1957, since when it has featured 20 times, most recently in 2018, when the leader over the summit was Adam Yates.| Year | Stage | Category | Start | Finish | Leader at the summit |
| 2018 | 16 | 1 | Carcassonne | Bagnères de Luchon |  Adam Yates|GBR |