Alto de Piedra

Overview

Alto de Piedra is a category 1 climb that asks a real question of your legs. It runs 10.9 km from a base at 537 m to a summit of 1365 m, a net elevation gain of 828 m. The average gradient sits at a stiff 7.58%, and with a maximum pitch of 10.8% there is nowhere on this climb that lets you truly switch off. At roughly three-quarters the difficulty tier below the fearsome hors catégorie label, it is the kind of ascent that rewards discipline and punishes anyone who starts too hot.

How the Gradient Unfolds

The headline number to hold in your mind is 7.58%. That average is high enough that the climb never really flattens, and the total ascent of 804 m — slightly less than the 828 m net gain, telling you the road climbs almost monotonically with only trivial dips — confirms there is no free rolling to recover on. The gap between the average of 7.58% and the maximum of 10.8% is only a little over three percentage points, which means the steep ramps are not wild spikes above a gentle base; they are sharpened versions of a road that is already demanding everywhere. Expect the hardest sections to feel like a grind rather than a wall, and plan to meter your effort across the full 10.9 km rather than saving everything for one crux.

Pacing Notes

This is a climb best ridden by the numbers. On a 7.58% average over nearly 11 km, most riders will spend somewhere close to their threshold for the entire ascent, so knowing your FTP is the single most useful piece of information you can bring to it. Aim to settle in just under threshold from the base at 537 m, and hold that ceiling steady rather than surging on the 10.8% pitches — every match you burn early on a climb this relentless is one you cannot spend near the 1365 m summit. If you have not tested recently, run the numbers through the FTP estimator first so your target power reflects your current form. Given the 828 m of gain, an even effort will almost always beat a stochastic one here.

Gearing

Gear for the sustained grade, not the average of your local hills. A 7.58% mean with 10.8% ramps over 828 m of climbing is where compact gearing earns its keep. A 34×32 is the sensible starting point for strong climbers who can turn a big gear at threshold, but most riders will be happier — and fresher at the top — on a 34×34, which keeps your cadence up on the steepest sections and protects your knees across the full 10.9 km. If your bike can take it, err toward the easier ratio; you can always leave gears in reserve, but you cannot invent them at 1300 m of elevation with legs full of lactate.

Summary

Alto de Piedra is an honest, unrelenting category 1 climb: 10.9 km, an average of 7.58%, and 828 m of net gain with almost no respite. Ride it on the numbers, gear it generously, and let the 7.58% average dictate your pace from bottom to top.

Length: 10.9 km
Average gradient: 7.58%
Max gradient: 10.8%
Start: 537 m
Summit: 1365 m
Net gain: 828 m
Total ascent: 804 m
Category: 1