Alto de Tursagá

Overview

Alto de Tursagá is a hors catégorie climb that gives you nowhere to hide. Over 10.2 km the road lifts from 679 m to a summit of 1687 m — a net gain of 1008 m — at an average gradient of 9.88%. That average alone tells the story: this is not a climb of gentle drags punctuated by the odd wall. It is relentlessly steep almost everywhere, and the 13.99% maximum only sharpens the edges of an already brutal profile.

For context, an average approaching 10% sustained for more than ten kilometres is the kind of number reserved for the hardest climbs in the sport. The HC label is fully earned here, and you should approach it with respect rather than ambition.

How the Gradient Unfolds

The defining feature of Tursagá is consistency. With a 9.88% average and a 13.99% maximum, the gap between "typical" and "hardest" is small — roughly four points. That means there are few genuine recovery sections. Where many climbs let you spin out a flatter kilometre to recover, Tursagá keeps the pressure close to its average for almost the entire 10.2 km.

The recorded total ascent of 979 m sits just below the 1008 m net gain, confirming there is essentially no downhill respite: the road climbs, and keeps climbing. Expect the steepest ramps near 13.99% to arrive without much warning, so read the road ahead and shift early rather than grinding to a halt mid-pitch.

Pacing Notes

On a climb this steep and this long, pacing is everything. Riding a climb of 10.2 km at 9.88% is a sustained threshold effort, so anchor your effort to your FTP rather than to feel — feel lies when the gradient never eases. If you are unsure of your number, run it through the FTP estimator before you commit to a pace.

A sensible target is to sit just below threshold for the opening kilometres, leaving headroom for the 13.99% ramps that will spike your power involuntarily. Going into the red early on a 1008 m climb is unforgiving; there is no flat kilometre later to bail you out. Ride the first third within yourself, hold steady through the middle, and only spend what is left once the summit at 1687 m is genuinely in reach.

Gearing

Do not under-gear this one. With a 9.88% average and pitches to 13.99%, you want the lowest ratio you can reasonably fit. A compact 34-tooth front paired with a 34×32 cassette is the practical minimum for most riders, and even then you will be working hard on the steepest ramps.

If your legs or your target time are in any doubt, go one step easier and fit a 34×34. The extra range costs you almost nothing on a climb with no fast sections, and it buys you a cadence you can actually sustain across the full 1008 m of gain. On Tursagá, spinning a low gear beats grinding a heavy one every single time.

Summary

Alto de Tursagá is a pure HC test: steep, sustained, and unforgiving from bottom to top. Gear low, pace to your threshold, and treat the whole 10.2 km as one long effort rather than a series of separate ramps.

Length: 10.2 km
Average gradient: 9.88%
Max gradient: 13.99%
Start: 679 m
Summit: 1687 m
Net gain: 1008 m
Total ascent: 979 m
Category: HC