From Ajac
Departmental road
Col du Bac — 620 m
Col du Bac, 620 m, in Aude. Main climb: 12.7 km at 3.8% average, 485 m of climbing from Ajac. The Tour de France has been over it 1 times since 2021.
At a glance
- Distance
- 12.7 km
- Elevation gain
- 485 m
- Average gradient
- 3.8 %
- Difficulty index
- 1.2 Easy
Figures for the main climb (From Ajac). The other climbs are further down.
Location
- Department
- Aude
- Altitude
- 620 m
- Coordinates
- 42.99807, 2.05329
Map of the climbs
- From Ajac
- From Chalabre
Cycling ascents
| Main climb | Distance | Elevation gain | Elevation loss | Average gradient | Steepest 500 m | Difficulty index |
|---|---|---|---|---|---|---|
| From Ajac | 12.7 km | 485 m | 102 m | 3.8 % | 8.3 % | 1.2 Easy |
| From Chalabre | 4.4 km | 226 m | — | 5.1 % | 9.2 % | 1.1 Easy |
Scroll the table sideways to see every column.
- 10% and above
- 8 to 10%
- 6 to 8%
- 4 to 6%
- under 4%
From Chalabre
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.
The Tour de France here
- Crossings
- 1
- Editions
- 1
- On the route
- from 2021 to 2021
- Usual category
- Category 3
| Year | Stage | Cat. | First over the top |
|---|---|---|---|
| 2021 | Stage 14 Carcassonne → Quillan | Category 3 | Kristian Sbaragli |
Cols nearby
- Col de Babourade 647 m · 10 km
- Col du Portel 601 m · 16 km
- Col des Sept Frères 1,258 m · 25 km
- Col du Campérié 514 m · 28 km
- Col de Saint-Louis 696 m · 29 km
- Port de Pailhères 2,001 m · 30 km
Straight-line distances, not road distances. The cols a climb actually rides over are listed above.
Frequently asked questions
How long is the climb to Col du Bac?
The hardest climb of Col du Bac, from Ajac, is 12.7 km long for 485 m of ascent, i.e. 3.8% average.
What is the steepest part of Col du Bac?
The steepest 500 m sits at 8.3%, and the hardest kilometre is the 6th, at 6.8%.
How many times has the Tour de France been over Col du Bac?
The Tour de France has crossed Col du Bac 1 times, from 2021 to 2021.
Col du Bac: add this col to your collection
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