Forcella del Fargno

Overview

Forcella del Fargno is an hors catégorie (HC) climb, the hardest classification a road ascent can carry. Over 10.3 km it averages a punishing 9.4%, dragging you from a start elevation of 543 m up to a 1512 m summit. That is a net elevation gain of 969 m, with 951 m of total ascent recorded along the way. Numbers like these put Fargno firmly in the same conversation as the most feared climbs in the sport: there is no false flat to hide in, no long recovery, just a wall that refuses to relent. If you want a benchmark for genuine climbing legs, this is it.

How the Gradient Unfolds

The 9.4% average is the headline, but the story is in the spikes. This climb hits a maximum gradient of 33.98% — a slope so severe it is closer to a staircase than a road. On a ramp like that, momentum evaporates and every pedal stroke becomes a standing effort. Because the net gain (969 m) exceeds the total ascent figure (951 m), the road climbs almost continuously with barely a metre given back; the descents that usually punctuate a mountain pass simply are not here. Expect the gradient to sit well into double digits for long stretches, punctuated by those savage pitches that push toward and past 20% and, at their worst, that 33.98% wall. Ride the shape, not the average.

Pacing Notes

The single biggest mistake on a climb this steep is starting too hard. With an average of 9.4% and pitches reaching 33.98%, your power will surge involuntarily on the ramps, so the flatter sections must be ridden conservatively to bank recovery. Anchor your effort to your FTP: aim to sit just below threshold on the sustained gradient and accept short over-threshold spikes on the steepest ramps, since you cannot soft-pedal a 33.98% wall. If you are unsure of your number, run the FTP estimator first and set your target zones before you commit to the 10.3 km. Over 969 m of climbing, a disciplined start is what leaves you something for the summit.

Gearing

Do not under-gear this one. With a 9.4% average and a 33.98% maximum, you want the widest range you can fit. A compact 34-tooth chainring paired with a wide cassette is the sensible baseline. A 34×32 is the minimum I would suggest for the sustained 9.4% sections, and it will still feel marginal when the road tips into the steepest ramps. If you have the option, go to 34×34 — the extra sprocket buys you cadence on the pitches that approach and exceed 20%, and it is the difference between spinning and grinding to a halt on the 33.98% wall. On a climb this steep, lower gearing is not weakness; it is what lets you keep the pedals turning across all 969 m of gain.

Summary

Forcella del Fargno is an uncompromising HC climb defined by its length, its 9.4% average, and that extraordinary 33.98% maximum. Pace it off your FTP, gear low, and respect the 969 m of ascent from bottom to top. Get those three things right and you will reach the 1512 m summit with a ride worth remembering.

Length: 10.3 km
Average gradient: 9.4%
Max gradient: 33.98%
Start: 543 m
Summit: 1512 m
Net gain: 969 m
Total ascent: 951 m
Category: HC