Passo di Rocca Brancia

Overview

Passo di Rocca Brancia is a genuine hors catégorie climb, and the numbers leave no doubt about it. Over 20.3 km the road climbs at an average of 7.76%, hauling you from a start elevation of 1037 m all the way to a summit at 2611 m. That is 1574 m of net elevation gain, and with the dips and rollers counted in, 1613 m of total ascent under your wheels. The high starting point means you are already in thin air before the first pedal stroke, and the summit sits well above 2600 m — high enough that altitude becomes a factor in its own right. This is a long, sustained effort with a maximum gradient of 18.4% lurking somewhere in its span. Treat it with respect from the bottom.

How the Gradient Unfolds

A 7.76% average over 20.3 km is relentless, but averages hide the story. The gap between the 7.76% mean and the 18.4% maximum tells you the climb is not evenly pitched — there are ramps that spike more than ten points above the average, and to balance them there must be gentler stretches where you can breathe. The difference between 1613 m of total ascent and 1574 m of net gain — roughly 39 m — confirms the road is not perfectly monotonic: it gives back a little height in places before demanding it again. Expect a rhythm of hard pitches punctuated by brief recoveries, with the steepest 18.4% sections the moments that will decide your day.

Pacing Notes

On a climb this long, discipline beats bravado. Your best guide is your FTP — hold steady, sustainable power on the shallower sections and reserve just enough headroom to absorb the 18.4% ramps without blowing apart. Because the effort spans 20.3 km, going too deep early costs you dearly near the 2611 m summit, where the altitude thins your ceiling further. If you are unsure of your numbers, run them through the FTP estimator before you plan your pacing. Aim to arrive at the steepest pitches with something in reserve.

Gearing

With an average of 7.76% and spikes to 18.4% over 20.3 km, gear low and gear generously. A compact chainring paired with a wide-range cassette is the smart baseline: a 34×32 will get most trained riders up the sustained sections, but the 18.4% maximum and the sheer length make a 34×34 the safer choice — it keeps your cadence turning on the ramps instead of forcing you to grind. Given the 1574 m of climbing, spinning a lower gear preserves your legs far better than muscling a bigger one.

Summary

Passo di Rocca Brancia earns its HC billing: 20.3 km, 7.76% average, a brutal 18.4% maximum, and a finish line at 2611 m in the thin mountain air. Pace it with your FTP, gear it low, and respect the distance.

Length: 20.3 km
Average gradient: 7.76%
Max gradient: 18.4%
Start: 1037 m
Summit: 2611 m
Net gain: 1574 m
Total ascent: 1613 m
Category: HC