Colle San Carlo

Aosta Valley, Italy

Gradient:

<4%

4–7%

7–10%

10–12%

>12%

Approach route

APPROACH ROUTES

Colle San Carlo

from Cretaz Desot

Distance

11.2km

Elevation

1046m

Avg %

9.3%

Max %

15.9%

<4%4–7%7–10%10–12%>12%

Colle San Carlo

from La Thuile

CAT 1

Distance

7.3km

Elevation

517m

Avg %

7.1%

Max %

11.7%

<4%4–7%7–10%10–12%>12%

Colle San Carlo is a Hors Catégorie ascent, topping out at 1 951 m. The Cretaz Desot approach is the hardest — 11.2 km at 9.3%, 1 046 m gained, maxing at 15.9%. The steepest kilometre averages 13.9%, around km 4.8. It can also be climbed from La Thuile (7.3 km at 7.1%): 2 measured approaches in all, each profiled kilometre-by-kilometre against Copernicus GLO-30 elevation data. On the Fiets scale it rates 10.7, among the region's hardest. Late spring through autumn offers the most reliable conditions on the pass.