Bocchetta di Terrabiotta

Overview

Bocchetta di Terrabiotta is a hors catégorie climb, and the numbers explain the rating instantly. Over 10.3 km the road averages 11.61%, lifting you from a start elevation of 234 m to a 1426 m summit. That is 1192 m of net elevation gain, with 1166 m of total ascent packed into a distance most riders would consider short. There is no easing off here: an 11.61% average across more than ten kilometres means the climb barely lets you breathe, and the 23.45% maximum gradient promises at least one moment that will test your composure as much as your legs.

How the Gradient Unfolds

The defining feature of this climb is relentlessness. When average gradient and total ascent line up as tightly as they do here — 1166 m of climbing over 10.3 km — it tells you the road rarely dips or flattens to give the numbers a chance to recover. An 11.61% average is not built from gentle ramps punctuated by walls; it is built from a road that is simply always steep. Somewhere along the way the gradient spikes to 23.45%, more than double the average, and that is where the climb bites hardest. Because the net gain of 1192 m sits just above the total ascent of 1166 m, you can expect the elevation profile to point almost continuously upward from bottom to top, with little rolling relief.

Pacing Notes

On a climb this steep, pacing discipline matters more than raw power. Ride the opening kilometres well under your FTP, because an 11.61% average leaves no flat sections to recover on — every effort you overspend early stays spent. Treat your FTP as a ceiling, not a target, and save headroom for the 23.45% pitch, where cadence collapses and the effort briefly surges regardless of how evenly you ride. If you are unsure of your threshold, run the numbers first with the FTP estimator so you can set a realistic power band for all 10.3 km. Climbing 1192 m at this steepness rewards patience: settle into a sustainable rhythm and let the summit come to you.

Gearing

Gear for survival, not for style. With an 11.61% average and ramps to 23.45%, most riders will want the lowest ratio they can fit. A compact 34-tooth chainring paired with a 34×32 cassette is a sensible minimum for holding cadence on the sustained pitches, but on a wall this steep a 34×34 setup gives you the extra margin that keeps your knees and back intact over the full 10.3 km. If your frame and derailleur allow anything easier still, use it — nobody regrets spare gears on an HC climb with 1166 m of ascent.

Summary

Bocchetta di Terrabiotta is a pure test of climbing endurance: short in distance, brutal in gradient, and unforgiving from base to summit. Pace conservatively, gear low, and respect the 23.45% pitch.

Length: 10.3 km
Average gradient: 11.61%
Max gradient: 23.45%
Start: 234 m
Summit: 1426 m
Net gain: 1192 m
Total ascent: 1166 m
Category: HC