Forca di Sass

Overview

Forca di Sass is a short climb only by the numbers on paper. Across 6.3 km it averages a brutal 11.27%, lifting you from 429 m at the base to 1136 m at the summit — a net gain of 707 m. That average alone puts it in rare company: sustained double-digit gradients are what separate merely hard climbs from genuinely punishing ones. Rated Category 1, it sits one rung below hors catégorie, and every metre of it demands respect. There is no gentle introduction here. The moment you tip onto the slope, the road pitches up and stays there.

How the Gradient Unfolds

The defining trait of Forca di Sass is consistency of severity. With an 11.27% average sustained over 6.3 km, there are precious few places to recover — the road rarely relents long enough to let your heart rate settle. The steepest section spikes to 25.51%, more than double the average, and a ramp that steep will stop all but the strongest riders in their tracks if they arrive already deep in the red. Because the total ascent of 619 m is slightly less than the 707 m net gain, the profile is essentially all up, with no meaningful descents or false flats to break the rhythm. What you see on the profile is what you get underfoot: a wall that leans harder in its cruellest pitches and never truly eases.

Pacing Notes

On a climb this steep, pacing is everything. Ride the opening kilometres at an effort you could hold to the top, not the effort the gradient tempts you into. A useful anchor is your FTP: on an 11.27% average you will spend long stretches at or above it, so know that number before you start. If you are unsure where yours sits, run the numbers through the FTP estimator and set a ceiling you can defend. The 25.51% max pitch is where riders blow up — approach it with a small buffer in the tank rather than at your limit. Over 6.3 km with 707 m of gain, going a fraction too hard early is far more costly than starting conservatively and finishing strong.

Gearing

Gear low, then go lower. For an average of 11.27% touching 25.51%, a compact 34-tooth chainring paired with a wide-range cassette is the sensible floor. A 34×32 is the minimum most amateurs should consider here, and even then the steepest ramp will have you grinding. If your legs or your fitness leave any doubt, fit a 34×34 — the extra sprocket buys precious cadence on the worst pitches and can be the difference between spinning to the 1136 m summit and walking. There is no shame in easier gearing on a climb that gains 707 m in 6.3 km.

Summary

Forca di Sass is a compact, uncompromising Category 1 ascent: steep from the base at 429 m, steeper still on its 25.51% ramp, and unrelenting all the way to 1136 m. Pace it conservatively, gear it generously, and it becomes a climb to savour rather than survive.

Length — 6.3 km
Average gradient — 11.27%
Max gradient — 25.51%
Start — 429 m
Summit — 1136 m
Net gain — 707 m
Total ascent — 619 m
Category — 1