Alto de La Divisa

Overview

Alto de La Divisa is a hors catégorie (HC) climb that packs an extraordinary amount of vertical into very little road. Over just 5.1 km it averages 14.96% and gains 769 m, lifting you from a start elevation of 1391 m to a summit of 2160 m. That average alone would put it among the steepest categorized climbs anywhere — but the average undersells it, because with a maximum pitch of 28.52% the hardest sections nearly double it. This is not a climb you settle into. It is a climb you survive, meter by meter, and the HC label here is earned honestly rather than by length.

How the Gradient Unfolds

The defining number is the gap between the 14.96% average and the 28.52% maximum. A climb that averages almost 15% has no genuine recovery — even its "easy" stretches sit at gradients most riders consider a wall — and the max tells you there are ramps that spike to nearly 29%, roughly double the average. Expect the effort to arrive in waves: sustained steep grades broken by even steeper pitches rather than by any flat. Across 5.1 km the road gains 769 m top to bottom, and because the total ascent of 717 m is slightly less than the net gain of 769 m, the profile is almost monotonically upward — there is essentially no descending or false-flat relief hidden in the climb. What goes up, keeps going up.

Pacing Notes

On a climb this steep, pacing is really power management. Your sustainable ceiling is defined by your FTP — but note that gradients near 28.52% will routinely force you well above it in short surges simply to keep the bike moving, so the goal is limiting how deep and how often you go into the red. If you don't know your threshold, run the numbers through the FTP estimator before you commit to a pacing plan. Because the climb is only 5.1 km, the temptation is to treat it as short; resist that. At 14.96% average, 5.1 km can take longer than a flatter climb twice its length, so meter it from the base and save something for the steepest ramps rather than blowing apart early.

Gearing

Gradients this severe demand the easiest gearing you can reasonably run. A compact 34-tooth chainring paired with a wide cassette is the sensible starting point. A 34×32 will get many trained riders up, but on the pitches approaching 28.52% you will be grinding at very low cadence and high torque. For most riders — and anyone not racing — a 34×34 is the smarter choice, giving you a meaningfully lower gear to spin the steepest ramps without stalling or overloading your knees. If your derailleur and frame allow something even easier, this is exactly the climb to use it on.

Summary

Alto de La Divisa is short, savage, and relentlessly upward: 5.1 km that never lets go, averaging 14.96% with pitches near 28.52% and gaining 769 m to a 2160 m summit. Bring your lowest gear, respect the base, and it rewards patience.

Length: 5.1 km
Average gradient: 14.96%
Max gradient: 28.52%
Start: 1391 m
Summit: 2160 m
Net gain: 769 m
Total ascent: 717 m
Category: HC