Alto de los Picos

Overview

Alto de los Picos is short on paper and brutal in the legs. Over just 5.3 km it averages a savage 12.45%, dragging you from 644 m at the base to a 1308 m summit — a net gain of 664 m packed into a climb barely longer than a warm-up. That density of vertical earns it the HC (hors catégorie) rating, the label reserved for climbs too hard to fit any other bracket. With a maximum pitch of 22.26%, this is not a climb you settle into. It is one you survive, meter by meter.

How the Gradient Unfolds

The defining feature here is that the average — 12.45% — is already close to what most riders consider a wall. There is very little respite baked into those 5.3 km. When a climb this short holds an average this high, it means the easier sections barely dip below double digits, and the punishing ones spike well beyond, all the way to 22.26% at the steepest ramp. The gap between the average and the max tells you the story: roughly ten percentage points separate a "normal" pitch from the cruelest one, so the road heaves and rears rather than settling into a rhythm. Expect to be out of the saddle repeatedly, then dropping back down only to be launched up again. The 632 m of total ascent recorded across the climb confirms it is almost entirely relentless up, with no meaningful descent to reset your legs.

Pacing Notes

On a climb this steep and this short, pacing is less about conserving and more about not blowing up in the first kilometer. The temptation is to attack the lower slopes while fresh, but at a 12.45% average you will pay for every premature effort long before the 1308 m summit. Anchor your effort to your FTP and accept that the 22.26% ramps will force you above threshold no matter how disciplined you are — the goal is to keep those spikes brief and recover on the "merely hard" sections between them. If you are unsure of your threshold number, run the FTP estimator before you commit to a target. Ride the first third within yourself; the climb only gives back what you save early.

Gearing

This is a gearing problem as much as a fitness one. At 12.45% average with pitches to 22.26%, you want the lowest ratio you can bolt on. A compact 34-tooth chainring paired with a wide cassette is the minimum sensible setup: 34×32 will get most fit riders over it, but on the steepest ramps you will be grinding at very low cadence and high torque. If your legs or knees are anything less than fresh, go for 34×34 — the extra sprockets buy you cadence exactly where the road tips toward 22.26% and every rotation counts. There is no shame in easier gearing on an HC climb; spinning a low gear beats stalling on a wall.

Summary

Alto de los Picos is a compact HC monster: 5.3 km, a 12.45% average, and ramps to 22.26% that make gearing and patience non-negotiable. Save your matches early, choose the low ratio, and let the 664 m of climbing to 1308 m come to you.

Length: 5.3 km
Average gradient: 12.45%
Max gradient: 22.26%
Start: 644 m
Summit: 1308 m
Net gain: 664 m
Total ascent: 632 m
Category: HC