Col de Valvacin

Overview

Col de Valvacin is a category 1 ascent that asks a serious, sustained effort from the moment the road tilts. Over 13.6 km it climbs from a start elevation of 904 m to a summit at 1788 m, a net gain of 884 m at an average gradient of 6.51%. That average is honest rather than gentle: 6.51% held for well over an hour of climbing is the kind of number that rewards discipline and punishes anyone who goes out too hard. With a max gradient of 15.48%, there is a real sting hidden inside the steady rhythm, so this is a climb to respect on the first slopes and finish with something left in the legs.

How the Gradient Unfolds

The defining tension here is the gap between the 6.51% average and the 15.48% maximum. On a climb of this length, that spread tells you the road is not uniform — long stretches sit close to the average, but there is at least one ramp roughly nine points steeper than the mean where the gradient bites hard. The net elevation gain of 884 m against a total ascent of 866 m confirms the climb is almost entirely uphill, with only a slight difference between the two figures, meaning very little false-flat or downhill relief to recover on. Expect the effort to be relentless: settle in early, and treat the steepest pitch as the crux rather than a surprise.

Pacing Notes

The smart way to ride 13.6 km at 6.51% is to anchor your effort to your FTP and hold a controlled, repeatable power rather than chasing early enthusiasm. Aim to sit just under threshold on the sustained sections so you have headroom for the 15.48% ramp, where power will spike whether you want it to or not. If you do not know your threshold, run the numbers through the FTP estimator before you plan the climb, then keep something in reserve for the final kilometres toward the 1788 m summit, where the thinning air and accumulated fatigue make every watt cost more.

Gearing

For a category 1 climb of this profile, gear for the steepest ramp, not the average. A compact chainring paired with a wide cassette is the sensible baseline: a 34×32 will carry most riders through the 6.51% sections at a sustainable cadence, but the 15.48% pitch is exactly where a 34×32 can leave you grinding. If you climb at a lower cadence, run out of legs late, or simply want insurance for that steep ramp, size up to a 34×34 — the extra range keeps your cadence honest across the full 884 m of climbing and protects your knees near the top.

Summary

Col de Valvacin is a long, steady, genuinely hard category 1 climb defined by a punishing 15.48% ramp inside an otherwise metronomic 6.51% average. Pace it to your threshold, gear for the steep, and it becomes one of the more satisfying summits you can earn.

Length: 13.6 km
Average gradient: 6.51%
Max gradient: 15.48%
Start: 904 m
Summit: 1788 m
Net gain: 884 m
Total ascent: 866 m
Category: 1