Alto del Ciervo

Overview

Alto del Ciervo is a genuine hors catégorie ascent, the kind of climb that rewrites your definition of "long." Over 33 km the road drags you from 1744 m at its foot to a summit of 3754 m, a net gain of 2010 m. The headline average of 6.09% sounds civilized, but averages lie on a climb this size — the total ascent of 2179 m means the road pitches up, eases, and pitches again rather than holding one steady grade. This is HC, the hardest category on the scale ahead of 1, 2, 3 and 4, and it earns the label through sheer duration and thin summit air as much as through any single wall.

How the Gradient Unfolds

The math tells the story. With 2179 m of total ascent against 2010 m of net gain, roughly 169 m of climbing is "extra" — short descents and false flats that you pay for twice. Expect the gradient to swing well above and below the 6.09% mean. The 18.14% maximum is the spike to fear: a ramp that steep, arriving deep into a 33 km effort, will empty your legs if you meet it in the wrong gear. Mentally, break the climb into thirds of about 11 km each and treat every kick toward that 18.14% ceiling as a discrete problem rather than part of a rhythm you can settle into.

Pacing Notes

On a climb of 2010 m of vertical, pacing is everything. Anchor your effort to your FTP: for a sustained ascent of this length, most riders hold something a touch below threshold, leaving headroom for the ramps toward 18.14%. If you don't know your number, run it through the FTP estimator before you commit to a target. Start conservatively — the summit sits at 3754 m, and altitude quietly erodes the power you produced fresh at 1744 m. Going out hard on the lower slopes is the classic way to blow apart before the final third.

Gearing

Come geared for the long haul. A compact 34-tooth inner ring is the sensible starting point, and the question is what cassette to pair with it. A 34×32 gives you a low bailout gear that will carry most trained climbers through the steady 6.09% stretches. But given the 18.14% maximum and the fatigue that 33 km brings, err generous: a 34×34 buys you a spinnable gear for the steepest ramps and lets you protect your knees and your reserves at altitude. If you can fit it, take the 34×34 — you will not regret the extra range on a climb this relentless.

Summary

Alto del Ciervo is a full HC test: long, high, and punctuated by ramps that bite. Respect the distance, gear low, pace from your FTP, and save something for the thin air near the top.

Length: 33 km
Average gradient: 6.09%
Max gradient: 18.14%
Start: 1744 m
Summit: 3754 m
Net gain: 2010 m
Total ascent: 2179 m
Category: HC