Colle di Sassa

Overview

Colle di Sassa is a short, approachable climb that packs its work into just 3.6 km. Rated category 4, it sits at the gentler end of the scale, but "gentle" here means well-suited to a strong, controlled effort rather than a grind. You start at 655 m and finish at 784 m, a net gain of 129 m over the full length. With an average gradient of 3.59%, this is a climb you can carry momentum on, keeping speed high and rhythm smooth. It is the kind of ascent that rewards riders who commit early and hold form rather than those who wait for a decisive wall — because on Sassa, the wall never fully arrives.

How the Gradient Unfolds

The defining number here is the gap between the 3.59% average and the 9.16% maximum. That spread tells you the climb is not uniform: most of its 3.6 km rolls along at or below the average, meaning there are stretches noticeably shallower than 3.59% to balance out the steeper pinch. The recorded max of 9.16% is the single hardest ramp, and it is where the climb briefly bites. Note too that the total ascent of 118 m is slightly less than the net elevation gain of 129 m — a sign of a false flat or a small descent tucked into the profile, where the road gives back a little before climbing again. Expect an undulating shape rather than a relentless drag: shallow running interrupted by one firm kick, then an easing toward the 784 m summit.

Pacing Notes

On a climb this short, pacing is about not overcooking the early kilometres and saving something for the 9.16% ramp. Because the average is only 3.59%, this is well above threshold territory for most riders willing to push — you can ride the shallow sections at or just under your FTP and then surge over the steep pinch without blowing up. If you do not know your sustainable power, run the numbers through the FTP estimator first so you can pick a target wattage rather than riding on feel. Hold a steady effort through the flatter opening, stay seated to conserve energy, and reserve a short, sharp lift for the max-gradient section near the middle. With only 129 m of gain to give away, the whole climb is over quickly — treat it almost like an extended threshold interval.

Gearing

With a 3.59% average and a peak of 9.16%, most riders will be comfortable on standard road gearing. A compact chainring paired with a 34×32 low gear gives ample range for the steep pinch while keeping cadence high on the shallower stretches. If you favour spinning, prefer lighter legs, or plan to ride Sassa at the end of a long day, a 34×34 offers a little extra insurance on the 9.16% ramp without any real downside on a climb this brief. Neither is strictly necessary given the modest 129 m of ascent, but easier gearing lets you protect your knees and hold a smoother cadence.

Summary

Colle di Sassa is a fast, punchy category 4 climb: short enough to attack, varied enough to stay interesting, with a single steep ramp to test your legs before the summit. Ride it smooth, save a match for the pinch, and you will crest at 784 m feeling strong.

Length: 3.6 km
Average gradient: 3.59%
Max gradient: 9.16%
Start: 655 m
Summit: 784 m
Net gain: 129 m
Total ascent: 118 m
Category: 4