Alto del Corazón

Overview

Alto del Corazón is an HC-category climb in Colombia, one of the hardest classifications a road ascent can carry. Over 9.1 km it delivers a net elevation gain of 1006 m, rising from a start elevation of 1547 m to a summit at 2553 m. That is a serious amount of vertical packed into a short distance, and the numbers tell you immediately this is a sustained, unrelenting effort rather than a rolling grind.

The gap between net elevation gain and total ascent is where the character of this climb hides. The road only nets 1006 m of gain, but you actually climb 1091 m in total — 85 m of that is repeated. That means roughly 85 m of descent is folded into the route, and every metre you drop you have to earn back. On a climb this steep, those give-backs break your rhythm and force repeated re-accelerations, which cost far more than the raw elevation suggests.

How the Gradient Unfolds

The average gradient of 11.08% is punishing on its own, but averages lie on undulating roads. Because the profile includes descending sections, the climbing pitches must be steeper than 11.08% to compensate — the true climbing ramps sit well into the teens. Do not pace this off the average; pace it off the steep pitches you will actually be pushing against.

• Short recovery or flatter dips where the road briefly gives back elevation
• Repeated short climbs that stack back-to-back after each descent
• A single steepest ramp that is the crux of the whole ascent — respect it

Pacing Notes

On a climb this steep and broken, even-speed pacing is a trap: holding constant speed means spiking your power on every ramp and blowing up early. Aim instead for even effort. Ride the steep pitches slightly below your ceiling and let your speed fall away on the ramps rather than chasing a number. Know your sustainable power output going in, and if you are unsure where that sits, run the numbers through the FTP estimator first. On the short descents, keep pedalling lightly to hold momentum into the next climb rather than coasting and stalling.

Gearing

A max gradient in the double digits governs your gearing choices entirely. Bring a compact or sub-compact chainset paired with a wide-range cassette — think 34×32 or 34×34 as a minimum. On pitches this steep, spinning a low gear at a survivable cadence beats grinding a big gear and cooking your legs. Check your setup before the ride. Confirm your rear derailleur clears your largest sprocket and that your chain length is correct for the cassette you plan to run.

Summary

• Length: 9.1 km
• Average gradient: 11.08%
• Net elevation gain: 1006 m
• Total ascent: 1091 m
• Category: HC

Alto del Corazón rewards riders who arrive prepared. Gear low, pace by effort, and treat the undulation as the real difficulty. Get those three right and the summit at 2553 m is within reach.