Alto de Cruz de Helecho

Overview

Alto de Cruz de Helecho is a hors catégorie (HC) climb — the hardest classification there is, sitting above categories 1 through 4. It runs 19.7 km from a base at 862 m up to a summit of 2197 m, delivering 1335 m of net elevation gain along the way. The average gradient is 6.79%, which on a climb this long is a genuinely serious number: there is nowhere to hide, and the summit sits high enough that thinner air becomes a factor in the final kilometres.

This is a climb defined by sustained effort rather than a single brutal ramp. At nearly 20 km, it demands patience, discipline, and a plan.

How the Gradient Unfolds

With a 6.79% average and a 10.34% maximum, the spread between the typical slope and the steepest pitch is fairly narrow — only about 3.55 percentage points. That tells you this is a remarkably consistent climb. You will not get long false-flat recoveries, but you also will not be ambushed by savage double-digit walls stacked back to back.

Note too that the total ascent of 1317 m is slightly less than the 1335 m net gain, which means there are essentially no descents interrupting the climb — it goes up, and keeps going up. Expect the gradient to hover around that 6.79% mean for long stretches, spiking toward 10.34% on the harder pitches. Ride it as one continuous effort rather than a series of short climbs.

Pacing Notes

On a climb of this length, pacing is everything. The single biggest mistake is starting too hard on the lower slopes and paying for it near the 2197 m summit. Anchor your effort to your FTP: for most riders, holding somewhere around 85–90% of FTP is a sustainable target for a sustained HC effort like this, adjusting down as altitude bites in the closing kilometres.

If you are not sure of your current threshold, run the numbers through the FTP estimator before you plan your ride. Break the 19.7 km into thirds and check your effort at each: steady on the first third, honest in the middle, and only open up once you can see the top.

Gearing

Gear for survival, not for pride. With a 6.79% average dragging on for nearly 20 km and pitches reaching 10.34%, you want a wide-range cassette so you can keep a high cadence and protect your legs deep into the climb.

A compact 34-tooth inner chainring is the sensible starting point. Pairing it with a 34×32 will get most fit riders up comfortably, but if you are carrying fatigue, climbing at altitude, or simply want to spin rather than grind, a 34×34 gives you that extra margin near the top. When in doubt on an HC climb this sustained, take the easier gear — you will be glad of it in the final kilometres above 2000 m.

Summary

Alto de Cruz de Helecho is a proper HC test: long, steady, and high. Pace it with your threshold in mind, gear it generously, and respect the fact that the effort only ends at 2197 m.

Length: 19.7 km
Average gradient: 6.79%
Max gradient: 10.34%
Start: 862 m
Summit: 2197 m
Net gain: 1335 m
Total ascent: 1317 m
Category: HC