Col de Portes

Jura, France

Gradient:

<4%

4–7%

7–10%

10–12%

>12%

Approach route

APPROACH ROUTES

Col de Portes

from Sault-Brénaz

CAT 1

Distance

9.8km

Elevation

581m

Avg %

5.9%

Max %

14.6%

<4%4–7%7–10%10–12%>12%

Col de Portes

from Andert

CAT 2

Distance

22.2km

Elevation

780m

Avg %

3.5%

Max %

9.8%

<4%4–7%7–10%10–12%>12%

Col de Portes is a Category 1 ascent in Jura, France, topping out at 1 010 m. The Sault-Brénaz approach is the hardest — 9.8 km at 5.9%, 581 m gained, maxing at 14.6%. The steepest kilometre averages 11.5%, around km 2.5. It can also be climbed from Andert (22.2 km at 3.5%): 2 measured approaches in all, each profiled kilometre-by-kilometre against Copernicus GLO-30 elevation data. On the Fiets scale it rates 3.5. Spring to autumn brings the steadiest riding, with snow possible in mid-winter.