Passo dei Garofani

Overview

Passo dei Garofani is one of those climbs that leaves no room to hide. Over 19.5 km it averages a punishing 8.63%, dragging you from a valley floor at 384 m all the way up to a 2066 m summit. That is a net elevation gain of 1682 m, with 1637 m of total ascent packed into a single, relentless effort. Rated HC — hors catégorie, the hardest classification above categories 1 through 4 — this is a climb that demands respect before you turn a pedal.

Nearly two vertical kilometres of climbing sustained at close to nine percent is exceptional. There is no easing off, no long valley traverse to recover on. From the moment the road tilts up, Garofani asks a question that keeps repeating for the better part of an hour or more.

How the Gradient Unfolds

The headline number is the 8.63% average, but the story is written in the spikes. With a maximum gradient of 24.82% — nearly three times the average — this climb hides ramps that could stop you dead if you arrive on the wrong gear or the wrong side of your energy reserves.

Do the math on the two elevation figures: 2066 m minus 384 m gives 1682 m of net gain, yet the total ascent is 1637 m. The near-identical numbers tell you this is an almost monotonic climb — it goes up, and it keeps going up, with barely any descending or false-flat relief across all 19.5 km. Expect the road to surge well past double digits on its steepest pitches, then settle back toward that brutal average. Pace for the pitches that touch 24.82%, not the ones that merely sit at 8.63%.

Pacing Notes

On a climb this long and this steep, pacing is everything. The single biggest mistake is going out too hard on the lower slopes and paying for it near the summit, where the air is thinner at 2066 m and your legs are already deep into 1682 m of accumulated gain.

Anchor your effort to your FTP. For a sustained HC effort of this duration, most riders should aim to sit just below threshold and hold it there — steady, repeatable, and sustainable for the full 19.5 km. If you are unsure of your number, run it through the FTP estimator before you tackle the climb, then translate that into a target power band and refuse to exceed it on the early ramps.

When the gradient spikes toward 24.82%, let power surge briefly rather than blowing your legs trying to hold cadence. Recover the effort as the slope relents.

Gearing

Do not under-gear this climb. With an average of 8.63% and spikes to 24.82%, you want a wide, forgiving range. A compact 34-tooth chainring paired with a 34×32 cassette is a sensible floor for strong climbers, but for most riders — especially over 19.5 km with 1682 m to gain — a 34×34 is the smarter, knee-saving choice. That extra sprocket buys you cadence on the steepest pitches and preserves your legs for the upper slopes toward 2066 m. If your bike accepts an even wider ratio, take it: nobody ever regretted an easier gear on an HC climb.

Summary

Passo dei Garofani is a pure test of climbing endurance — long, unrelenting, and steep from bottom to top. Pace it off your threshold, gear low, and respect the ramps that touch 24.82%.

Length: 19.5 km
Average gradient: 8.63%
Max gradient: 24.82%
Start: 384 m
Summit: 2066 m
Net gain: 1682 m
Total ascent: 1637 m
Category: HC