Alto de Córdoba

Overview

Alto de Córdoba is a hors catégorie (HC) climb, the hardest classification a road can earn, and its numbers explain why. Over 21.8 km it drags you from a start elevation of 1407 m to a summit at 2850 m, a net gain of 1443 m with 1432 m of total ascent. The average gradient sits at 6.62%, which reads as manageable until you factor in the length and the thin air near the top. This is a climb of endurance first and punch second — nearly a full hour of sustained effort for most riders, with a maximum gradient of 17.18% waiting to break any rhythm you've settled into.

How the Gradient Unfolds

The near-identical figures for net gain (1443 m) and total ascent (1432 m) tell you something useful: this road climbs almost continuously, with only a sliver of respite or descent across its 21.8 km. There are no long false flats hiding in that profile to let you recover for free. Instead, the 6.62% average is the honest baseline you'll spend most of your time near or above. The 17.18% max gradient marks the sharpest ramp — well over twice the average — and encountering it after already gaining most of that 1443 m, in progressively thinner air above 2000 m, is what defines the climb's difficulty. Expect a grind that rarely eases rather than a series of dramatic swings.

Pacing Notes

On a climb this long, discipline beats bravado. Your target should be an effort you can hold for the full 21.8 km, which means riding at or just below your threshold rather than chasing the steep sections. Anchor your pacing to your FTP and resist the urge to surge on the ramps toward 17.18% — every match you burn early on a 1443 m ascent is one you won't have near the 2850 m summit, where altitude quietly taxes every watt. If you don't have a reliable threshold figure, run the numbers through the FTP estimator before you commit to a target. Aim to crest feeling like you paced it right, not like you barely survived.

Gearing

Gear for the long haul, not the average. A compact 34-tooth chainring is essential here, and the question is only how much range you pair it with at the back. A 34×32 is the sensible starting point for strong climbers who want to keep cadence honest across a 6.62% average. But given the 21.8 km length, the 1443 m of climbing, and that 17.18% max ramp arriving late, most riders will be far happier with a 34×34. The extra range keeps your legs spinning when fatigue and altitude conspire near the top. When in doubt on an HC climb, choose the easier gear.

Summary

Alto de Córdoba earns its HC status through sheer relentlessness: 21.8 km at 6.62%, a 1443 m net rise to 2850 m, and a 17.18% sting to keep you honest. Pace it patiently, gear it generously, and let the summit come to you.

Length: 21.8 km
Average gradient: 6.62%
Max gradient: 17.18%
Start: 1407 m
Summit: 2850 m
Net gain: 1443 m
Total ascent: 1432 m
Category: HC