Alto del Torzo

Overview

The Alto del Torzo is the kind of climb that hides its severity in its length. At just 2.4 km, it looks harmless on paper — barely a warm-up next to the great alpine giants. But the numbers tell a different story. Over that short distance it averages a punishing 10.51%, hauling you from a start elevation of 31 m to a summit of 278 m. That is a net gain of 247 m packed into less than two and a half kilometres, and it earns its Category 2 rating not through duration but through relentless steepness.

This is a climb of intensity, not attrition. There is nowhere to recover, no flat shelf to shake out your legs. From the moment the road tilts up, it stays up.

How the Gradient Unfolds

With a 10.51% average and a 13.72% maximum, the Torzo never really eases. The gap between the average and the max is only a little over three percent, which tells you the gradient is remarkably consistent — this is not a climb of dramatic ramps followed by breathers. Instead it holds a punishing double-digit pitch almost the whole way, with the steepest sections nudging toward 13.72%.

Note too the difference between the net elevation gain of 247 m and the total ascent of 206 m. That gap hints at very short pitches where the road briefly relents — but do not expect true relief. The climbing is near-continuous, and the road drags you upward without mercy toward the 278 m summit.

Pacing Notes

On a climb this short and steep, pacing is about control, not conservation. You will be riding at or above your FTP for much of the 2.4 km, and the temptation to attack the lower slopes is what breaks most riders before the top. Start below the effort you think you can sustain, then let the closing metres take whatever is left.

If you do not know your threshold, estimate it first with the FTP estimator so you can meter your effort rather than guessing. On a 10.51% average, going into the red early means walking the last few hundred metres — settle into a rhythm you can hold to the 278 m summit.

Gearing

Do not under-gear this one. With a sustained 10.51% average and a 13.72% max, gearing that feels generous on rolling terrain will leave you grinding to a standstill here. A compact 34-tooth chainring paired with a wide cassette is the sensible baseline.

A 34×32 is the minimum most fit riders will want, and even then the steepest pitches will have you out of the saddle. If you climb at a lower cadence, carry extra weight, or simply want to spin rather than muscle your way up, step to a 34×34 — the extra teeth are cheap insurance against blowing up on a wall that offers no rest. There is no shame in easy gears on the Torzo.

Summary

The Alto del Torzo is proof that a climb does not need length to hurt. Short, steep, and unremitting, it demands respect from the first pedal stroke to the last. Gear low, pace with discipline, and let the summit come to you.

Length: 2.4 km
Average gradient: 10.51%
Max gradient: 13.72%
Start: 31 m
Summit: 278 m
Net gain: 247 m
Total ascent: 206 m
Category: 2