Alto del Cabezón

Overview

Alto del Cabezón is a category 1 climb that rewards patience over aggression. Over 14.9 km it lifts you from a valley floor at 715 m to a summit at 1606 m, a net gain of 891 m. The average gradient sits at 5.97%, firmly in the range where a steady rhythm beats repeated surges. This is not the brutal wall of an hors catégorie monster, nor the short sharp effort of a fourth-category ramp — it is a sustained, honest test of aerobic durability that stretches close to an hour for most riders.

How the Gradient Unfolds

The headline figure is that 5.97% average, but averages hide the texture. With a maximum gradient of 10.44%, the climb clearly stacks steeper ramps against gentler recovery stretches rather than holding one constant slope. Expect the road to breathe: sections around and below the mean where you can settle into a cadence, punctuated by pitches that nearly double it. The total ascent of 883 m runs slightly under the 891 m net gain, which tells you the profile climbs almost relentlessly upward with little in the way of descending relief. Once you leave 715 m, you keep gaining until the 1606 m top. Read the road ahead and save something for the steeper kicks toward 10.44%.

Pacing Notes

The smartest way to ride Cabezón is by effort, not ego. Hold a power target anchored to your FTP and let the gradient dictate speed rather than the other way around. On the 5.97% average stretches, aim to sit just under threshold so the steeper ramps toward 10.44% don't tip you into the red early. Nearly an hour of climbing means small overcooked efforts compound quickly across 14.9 km.

If you're unsure of your current number, run the FTP estimator before you plan your pacing. Knowing your threshold turns those steep pitches from guesswork into a managed effort, letting you spend energy where it counts and arrive at 1606 m with something left.

Gearing

For a sustained 14.9 km at 5.97% with ramps to 10.44%, gear for the steep bits, not the average. A compact 34-tooth inner chainring is the sensible starting point. Pair it with a wide cassette: a 34×32 keeps a comfortable spin on the mean gradient, while a 34×34 gives you the extra bailout ratio for the 10.44% pitches when your legs are deep into the 891 m of accumulated climbing. If you tend to grind rather than spin, or you're carrying fatigue, favour the 34×34. Preserving cadence over an effort this long protects your legs far more than muscling a bigger gear.

Summary

Alto del Cabezón is a classic category 1 grind: long enough to test your endurance, steep enough in places to punish poor pacing, and honest throughout. Ride it by effort, gear generously, and let the 14.9 km come to you.

Length: 14.9 km
Average gradient: 5.97%
Max gradient: 10.44%
Start: 715 m
Summit: 1606 m
Net gain: 891 m
Total ascent: 883 m
Category: 1