Passo della Gaiarda

Overview

Passo della Gaiarda is an hors catégorie (HC) climb, the hardest rating on the road, and its numbers make the case plainly. Over 29 km the road lifts you from 262 m at the base to a summit of 2242 m, a net gain of 1980 m. Factor in the small dips and rollers that break up the ascent and the total climbing swells to 1986 m. The average gradient sits at 6.83%, but the max touches 21.8% — a spread that tells you this is not a metronomic drag but a climb of moods. At nearly 30 km, it demands the kind of sustained effort usually reserved for the biggest passes in the sport.

How the Gradient Unfolds

A 6.83% average across 29 km is a punishing baseline, but the real story lives in the variance. With a maximum of 21.8%, this climb hides ramps that are more than three times the average steepness. Expect long stretches that hover near the mean, where you settle into a rhythm, punctuated by walls that spike toward that 21.8% ceiling and force you out of the saddle or deep into your easiest gear. The near-2000 m of vertical gain is not delivered evenly; the small difference between the 1980 m net gain and the 1986 m total ascent confirms there are brief reprieves — false flats or shallow descents — that let the gradient reload before the next kick. Treat every apparent easing as a chance to recover, not to attack.

Pacing Notes

On a climb this long, pacing is everything. A steady effort just below your FTP is the only sustainable way to cover 29 km without blowing apart on one of the 21.8% ramps. Aim to hold a controlled power on the average-gradient sections and accept that the steepest pitches will briefly push you over threshold — that is fine, provided you settle back down immediately after. If you don't know your threshold yet, run the numbers through the FTP estimator before you commit to the base. Starting too hard on the lower slopes is the classic error here; with 1980 m still to climb, the summit at 2242 m will find you if you overreach early.

Gearing

For an HC climb averaging 6.83% with ramps to 21.8%, gear low and gear generously. A compact 34-tooth chainring paired with a wide-range cassette is the sensible foundation. A 34×32 will get most fit riders up the sustained sections, but on a climb 29 km long with pitches near 21.8%, the extra range of a 34×34 is worth having — it keeps your cadence up and your knees intact when the road rears toward that maximum. If your setup allows anything easier than 34×34, don't be too proud to fit it. Spinning a low gear over 1986 m of ascent beats grinding to a halt on a wall.

Summary

Passo della Gaiarda is a genuine HC test: long, steep in bursts, and unrelenting in total. Respect the 29 km, pace beneath threshold, gear low, and the 2242 m summit is yours.

Length: 29 km
Average gradient: 6.83%
Max gradient: 21.8%
Start: 262 m
Summit: 2242 m
Net gain: 1980 m
Total ascent: 1986 m
Category: HC