Col de l'Iseran
from Bessans · French Alps, France
Gradient:
<4%
4–7%
7–10%
10–12%
>12%
GRADIENT PROFILE
<4%4–7%7–10%10–12%>12%
Km-by-km average gradient from Copernicus GLO-30 elevation data along the road.
From Bessans, Col de l'Iseran climbs 23.7 km at 4.6% average, gaining 1 082 m to the 2 764 m summit, ramping to 13.7%. Its steepest kilometre averages 12.7% near km 21.8. On the Fiets scale this side rates 6.7. It is the gentler of the two approaches.
Surface
Asphalt99%
Gravel1%
Verified from OpenStreetMap surface data along the climb.
RIDE THE CLIMB
KM 0.3
KM 0.8
KM 1.8
KM 2.3
KM 2.8
KM 4.4
KM 5.9
KM 7.5
KM 8.5
KM 9.0
KM 11.1
KM 11.6
KM 12.6
KM 13.7
KM 14.7
KM 15.7
KM 17.3
KM 17.8
KM 18.8
KM 20.9
KM 21.9
KM 22.4
KM 23.7FROM BESSANS
Distance
23.7km
Elevation gain
1082m
Avg gradient
4.6%
Max gradient
13.7%
Summit
2764m
Category
CAT 1