Passo del Fargno

Overview

Passo del Fargno is an hors catégorie climb that earns its rating the hard way. Over just 10.5 km the road drags you from a start elevation of 542 m to a summit of 1512 m — a net gain of 970 m, with 956 m of total ascent packed into that single push. The average gradient of 9.21% is severe enough on its own, but the number that defines this climb is the maximum: a savage 33.95% pitch that turns a hard day into a survival exercise. This is not a rhythm climb you settle into and forget. It is a climb that keeps testing whether you chose the right gear, the right pace, and the right amount of restraint in the opening kilometres.

How the Gradient Unfolds

With a 9.21% average across 10.5 km, there is no flat recovery hiding anywhere here. The near-identical net gain (970 m) and total ascent (956 m) confirm it: the road climbs almost the entire way, with only trivial dips. That consistency is the trap. Because the average is already close to double digits, the ramps that reach toward 33.95% arrive on legs that never got a break. Expect long stretches hovering around the average, punctuated by pitches that spike far above it. The gap between 9.21% and 33.95% is enormous — nearly 25 percentage points — so the difference between a steady section and a wall is dramatic. Read the road ahead and shift early.

Pacing Notes

On a climb this steep, pacing is really power management. Anchor your effort to your FTP: the sustainable ceiling you can hold for the roughly 40 to 60 minutes this ascent will demand of most riders. Aim to sit just under threshold on the average grades so you keep a reserve for the 33.95% spikes, where power will surge whether you want it to or not. Going into the red early on a 970 m climb almost always costs more time than it saves. If you do not know your threshold, estimate it first with the FTP estimator, then set a realistic target and hold discipline through the opening kilometres — the summit at 1512 m rewards patience, not bravado.

Gearing

Do not under-gear this one. For a 10.5 km climb averaging 9.21% with pitches to 33.95%, a compact chainring paired with a wide cassette is the sensible floor. A 34×32 will get many fit riders up the sustained sections, but the 33.95% wall is where a 34×32 can leave you grinding at cadences that shred your legs. If your bike can take it, run a 34×34 for extra margin — that lowest gear is precisely what keeps the steepest ramps spinnable instead of a standing-still slog. When in doubt on an HC climb, choose the easier ratio; you will never regret spare gears on a 970 m ascent.

Summary

Passo del Fargno is a short, unrelenting HC climb: 10.5 km, 9.21% average, and a genuinely fearsome 33.95% maximum. Gear conservatively, pace to your threshold, and respect the wall.

Length: 10.5 km
Average gradient: 9.21%
Max gradient: 33.95%
Start: 542 m
Summit: 1512 m
Net gain: 970 m
Total ascent: 956 m
Category: HC