Col de Barberine

Overview

Col de Barberine is a hors catégorie giant — the kind of climb that redefines what a bad day on the bike can feel like. Over 22.3 km it averages 7.59%, dragging you from a valley floor at 463 m all the way to a 2156 m summit. That is 1693 m of net elevation gain, and because the road dips and rolls on the way up, the total ascent comes to 1809 m. The extra 116 m between net gain and total ascent tells you this is not a metronomic drag: there are false flats and short descents that break rhythm and force repeated re-accelerations.

At more than 22 km in length and comfortably above 7.5% average, Barberine sits firmly in HC territory — the hardest classification, above category 1. This is a climb you plan a whole ride around, not one you tack onto the end.

How the Gradient Unfolds

The headline average of 7.59% is honest but incomplete. The climb hides a 21.98% maximum pitch — nearly three times the average — which means somewhere on this ascent the road briefly turns into a wall. Ramps that steep cannot be paced through with power alone; they demand you already be in the right gear and out of the saddle before you hit them.

With 1809 m of total ascent spread across 1693 m of net gain, expect the profile to stack steep sections against recovery lulls. The steep pitches carry gradients well above the average to compensate for the flatter, restorative stretches. Treat every downhill or false flat as a chance to eat, drink, and reset your legs before the next sustained wall arrives.

Pacing Notes

On a climb this long, discipline beats bravado. The single biggest mistake is chasing the early ramps and paying for it in the final kilometres above 2000 m, where thin air quietly steals your top end. Anchor your effort to your FTP and aim to sit just below threshold on the sustained sections, spending matches only on the steepest pitches near that 21.98% max.

If you do not know your threshold, run the numbers through the FTP estimator before you go — pacing an HC climb by feel alone is how riders blow up two-thirds of the way up. Divide the 22.3 km into mental thirds and check in with your breathing at each one.

Gearing

Do not under-gear this one. With a 7.59% average sustained for 22.3 km and a 21.98% max lurking, a compact 34-tooth chainring is the sensible front end. Pair it with at least a 34×32 for the long grind, and if you climb at a lower cadence, carry lighter weight, or simply want insurance for the steepest ramps, go to 34×34. The wider ratio keeps your cadence up and your knees intact across 1809 m of climbing — on a summit finish at 2156 m, spinning a low gear beats grinding a heavy one every time.

Summary

Col de Barberine is a true HC test: long, steep, and unrelenting from 463 m to 2156 m. Pace it by threshold, gear it generously, and respect the 21.98% max, and this monster becomes one of the most rewarding summits you can chase.

Length: 22.3 km
Average gradient: 7.59%
Max gradient: 21.98%
Start: 463 m
Summit: 2156 m
Net gain: 1693 m
Total ascent: 1809 m
Category: HC