Colle di Sora II

Overview

Colle di Sora II is a short, honest category-4 climb that rewards rhythm over drama. It measures 2.2 km from base to top, starting at 149 m and cresting at 270 m for a net elevation gain of 121 m. The average gradient sits at 5.56%, and the steepest pitch peaks at just 6.29% — a narrow spread that makes this one of the more predictable climbs you will meet. There are no cruel ramps hiding here, only a consistent grind that lets you settle in and hold a number. For riders building climbing legs, it is an ideal repeatable effort: long enough to matter, short enough to attack more than once in a session.

How the Gradient Unfolds

The defining feature of Colle di Sora II is its uniformity. With an average of 5.56% and a maximum of only 6.29%, the difference between the typical slope and the hardest pitch is well under one percent. That means the climb never truly spikes — it simply leans against you at a near-constant angle for the full 2.2 km. The total ascent of 105 m tracks closely with the 121 m net gain, confirming a road that climbs almost continuously rather than rolling. Expect the gradient to bite gently from the base, stay honest through the middle, and hold its shape to the 270 m summit without any sting-in-the-tail surprise.

Pacing Notes

Because the slope barely varies, this is a climb you can meter precisely against your FTP. At 2.2 km and 5.56%, most riders will clear it in a single sustained effort, so the trap is going out too hard on the shallow-feeling opening ramp and paying for it before 270 m. Aim to settle just below threshold early, then lift over the final third once you can see the top holding at 6.29% at worst. If you do not know your threshold number yet, run the numbers through the FTP estimator and set a target power you can hold for the whole 2.2 km. Repeat the climb and you will quickly learn exactly where your ceiling sits on a gradient this steady.

Gearing

Nothing about Colle di Sora II demands extreme gearing — the 6.29% maximum is manageable seated for most trained riders. A compact 34-tooth inner chainring paired with a 34×32 low gear gives comfortable range for the 5.56% average while leaving headroom to spin the steeper sections. If you are carrying fatigue, tackling this after harder climbs, or simply prefer to twiddle, a 34×34 adds a touch more relief without over-gearing a climb this modest. Either setup lets you stay on top of the cadence across all 2.2 km.

Summary

Colle di Sora II is a compact, evenly graded category-4 climb — 2.2 km of steady 5.56% that never exceeds 6.29%. It is perfect for pacing practice, threshold work, and repeatable efforts. Learn it once and you will own it.

Length: 2.2 km
Average gradient: 5.56%
Max gradient: 6.29%
Start: 149 m
Summit: 270 m
Net gain: 121 m
Total ascent: 105 m
Category: 4