Col d'Ubine

Overview

Col d'Ubine is a long, deceptive category-1 climb that unspools over 16.9 km from a base at 803 m to a summit at 1698 m. On paper the 5.3% average gradient reads as friendly — the kind of number that tempts you into starting too hard. Don't be fooled. That average hides a max pitch of 26.09%, a wall steep enough to stall a rider mid-pedal-stroke and force a walk if the gearing isn't right. With 895 m of net elevation gain packed into a climb that also logs 855 m of total ascent, almost every metre you gain, you keep — this is a relentless upward drag rather than a rolling profile that gives anything back.

How the Gradient Unfolds

The story of Col d'Ubine is the gap between its average and its extremes. A 5.3% mean across 16.9 km would, if evenly spread, be a steady tempo climb you could ride at a fixed rhythm for the better part of an hour. But the 26.09% max tells you the gradient is anything but even. Expect shallower ramps that let you settle, punctuated by sharp kicks where the road rears up far beyond anything you can sustain aerobically. The difference between the 803 m start and the 1698 m summit — that full 895 m of vertical — is earned in uneven instalments. Read the road ahead constantly: the flatter sections are where you recover for the pitches, not where you attack.

Pacing Notes

Pace Col d'Ubine off your sustainable power, not your ego. Because the average sits at 5.3% but the terrain swings wildly, the smart approach is to hold a steady effort just under your FTP on the gentler grades and accept that the steep ramps will briefly punch you well above it — that's unavoidable when the road hits 26.09%. Over 16.9 km, repeated surges above threshold will empty your tank long before the summit if you let them stack up. If you don't know your threshold, run the numbers through the FTP estimator before you go, then set a ceiling and refuse to cross it on the shallow stretches. Bank patience early; the last of the 895 m of climbing is no place to discover you overcooked the opening.

Gearing

Gear for the 26.09% max, not the 5.3% average — that single wall dictates everything. A compact 34-tooth chainring is the sensible front, and at the back you want as much range as you can get. A 34×32 is the practical minimum here, and even then the steepest ramp will have you grinding at very low cadence. If your legs or your knees prefer to spin, fit a 34×34 and give yourself a genuine bailout gear for the worst pitch. Over 16.9 km with 895 m to gain, the extra sprocket isn't luxury — it's what keeps your cadence alive on the ramps so you arrive at 1698 m with something left.

Summary

Col d'Ubine rewards discipline: respect the 26.09% spikes, ride the 5.3% sections conservatively, and let low gearing carry you through. Get the pacing and the cassette right and the full 895 m to 1698 m becomes a climb you finish strong rather than survive.

Length: 16.9 km
Average gradient: 5.3%
Max gradient: 26.09%
Start: 803 m
Summit: 1698 m
Net gain: 895 m
Total ascent: 855 m
Category: 1