Col du Grand Colombier

Jura, France

Gradient:

<4%

4–7%

7–10%

10–12%

>12%

Approach route

APPROACH ROUTES

Col du Grand Colombier

from Culoz

CAT 1

Distance

17.7km

Elevation

1252m

Avg %

7.1%

Max %

22.1%

<4%4–7%7–10%10–12%>12%

Col du Grand Colombier

from Bordèze

CAT 1

Distance

12.9km

Elevation

887m

Avg %

6.9%

Max %

15.8%

<4%4–7%7–10%10–12%>12%

Rising to 1 498 m, Col du Grand Colombier is a Category 1 cycling climb. From Culoz, the toughest side climbs 17.7 km at 7.1% average — 1 252 m of ascent, pitching to 22.1% at its steepest. The steepest kilometre averages 16.1%, around km 6.3. It can also be climbed from Bordèze (12.9 km at 6.9%): 2 measured approaches in all, each profiled kilometre-by-kilometre against Copernicus GLO-30 elevation data. On the Fiets scale it rates 9.4, among the region's hardest. Late spring through autumn offers the most reliable conditions on the pass.