From Saint-Mamet
Departmental road
Eth Portilhon, 1,293 m, in Haute-Garonne. Main climb: 8.2 km at 7.8% average, 646 m of climbing from Saint-Mamet. The Tour de France has been over it 5 times since 1999.
Figures for the main climb (From Saint-Mamet). The other climbs are further down.
| Main climb | Distance | Elevation gain | Average gradient | Steepest 500 m | Difficulty index |
|---|---|---|---|---|---|
| From Saint-Mamet | 8.2 km | 646 m | 7.8 % | 12.8 % | 5.4 Sustained |
| From Bossòst (España) | 8.2 km | 582 m | 7.1 % | 10.9 % | 4.4 Moderate |
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Departmental road
Departmental road
2 ascents proposed here — other ways up this col remain possible.
Distances and elevation gains derived from the OpenStreetMap road network and a digital terrain model, measured on the very profile shown here.
Figures computed on 7 September 2026.
| Year | Stage | Cat. | First over the top |
|---|---|---|---|
| 2018 | Stage 16 Carcassonne → Bagnères-de-Luchon | Category 1 | Adam Yates |
| 2006 | Stage 11 Tarbes → Pla de Beret (ESP) | Category 1 | |
| 2003 | Stage 14 Saint-Girons → Le Louron | Category 1 | |
| 2001 | Stage 13 Foix → Pla d'Adet | — | |
| 1999 | Stage 15 Saint-Gaudens → Piau-Engaly | Category 1 |
Straight-line distances, not road distances. The cols a climb actually rides over are listed above.
The hardest climb of Eth Portilhon, from Saint-Mamet, is 8.2 km long for 646 m of ascent, i.e. 7.8% average.
The steepest 500 m sits at 12.8%, and the hardest kilometre is the 2th, at 10.5%.
The Tour de France has crossed Eth Portilhon 5 times, from 1999 to 2018.
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