Colle del Sole

Overview

Colle del Sole is a short, approachable climb that rewards steady effort over raw power. At 5.5 km with an average gradient of 3.3%, it sits firmly in category 4 — the most forgiving rung on the classification ladder, well below the leg-shredding demands of an HC ascent. You start at just 34 m of elevation and top out at 217 m, a summit that arrives sooner than most riders expect. The net gain of 183 m tells you everything about the character here: this is a climb of accumulation, not confrontation.

How the Gradient Unfolds

The numbers describe a remarkably even climb. With an average of 3.3% and a maximum of only 5.77%, the pitch never spikes into the red. The gap between average and max is small, so there are no cruel ramps waiting to snap your rhythm — just a consistent, rolling drag upward. Note too that the total ascent of 168 m is slightly less than the net gain of 183 m implies you'd expect on a purely uphill road; the difference points to a road that isn't perfectly monotonic, with the odd flat or fractional dip built into the profile. Practically, that means brief moments where you can recover before the gradient resumes its gentle pull.

Pacing Notes

Because the gradient stays shallow, Colle del Sole is a climb where momentum matters more than grinding. Ride it just below or right around your threshold and you'll clear all 5.5 km without ever redlining. Use your FTP as your anchor: on a 3.3% average, most of the effort translates directly into speed rather than fighting steep pitches, so holding a smooth, sustained power number pays off. If you're not sure where your threshold sits, run the numbers through our FTP estimator before you set your target. On a climb this measured, over-cooking the opening kilometre costs you far more than a conservative, even effort ever will.

Gearing

You do not need a wide climbing range here. With a maximum gradient of 5.77% and an average of 3.3%, a standard compact setup is more than enough. A 34×32 lowest ratio gives you comfortable spinning gears for the whole 5.5 km, and most riders will rarely reach for the bottom of the cassette. If you prefer to keep a high cadence or you're carrying fatigue from a longer day, a 34×34 adds a touch more insurance — but on Colle del Sole it's a luxury rather than a necessity. The shallow pitch means gearing choice is about comfort, not survival.

Summary

Colle del Sole is an ideal climb for building rhythm, testing pacing, or warming into a bigger ride. Short, even, and never severe, it delivers a satisfying 183 m of climbing without ever tipping into brutality.

Length: 5.5 km
Average gradient: 3.3%
Max gradient: 5.77%
Start: 34 m
Summit: 217 m
Net gain: 183 m
Total ascent: 168 m
Category: 4