Alto del Chapetón

Overview

Alto del Chapetón is a Category 1 climb in Colombia (CO), running 9.4 km from base to summit. Over that distance it gains 745 m of net elevation, lifting you from a start elevation of 216 m to a summit at 961 m. The average gradient across the ascent is 7.96%, which puts it firmly in the range where sustained effort, not brute force, decides your time.

The net figure only tells part of the story. Total ascent on this climb is 1019 m, which is 274 m more than the net gain of 745 m. That gap means the road doesn't rise cleanly — it dips and recovers, forcing you to reclaim height you already earned. Every metre of descent inside the climb is height you have to climb again, so the effort is heavier than a smooth 7.96% grade would suggest.

How the Gradient Unfolds

The 7.96% average masks a road that swings hard around it. With 274 m of hidden re-ascent baked into the profile, the climb alternates between steep pushes and short reliefs, and the steepest ramp bites at 27.36% — a wall that will spike your heart rate no matter how disciplined your pacing.

• Flatter and false-flat recovery sections where the grade drops well below average, letting you spin and reset.
• Short descents inside the climb that give brief rest but cost you height, adding to total ascent.
• Repeated punchy pitches that climb back above the 7.96% average.
• The steepest ramp at 27.36%, a sharp wall that demands your lowest gear and a seated, controlled cadence.

Pacing Notes

Because this climb undulates, even-speed pacing is a trap — holding a fixed speed forces massive power spikes on the steep pitches and wasted watts on the flatter stretches. Ride to even effort instead. Anchor your intensity to your sustainable power output and let your speed rise and fall with the grade: back off slightly on the walls so you don't blow up, and press on the shallow sections where the return is cheap. If you don't know your ceiling, run the numbers through the FTP estimator before you commit to a target for the full 9.4 km.

Gearing

The steepest gradient governs your setup, and at 27.36% you cannot bluff your way up on road gearing. Fit a compact or sub-compact chainset paired with a wide-range cassette — a 34×32 or 34×34 gives you the low end to keep turning the pedals seated instead of grinding to a stall. Check your drivetrain before the ride: confirm the cassette actually mounts, the derailleur handles the range, and your legs have tested that low gear. Discovering you're over-geared on a 27% wall is a walk.

Summary

• Length: 9.4 km
• Average gradient: 7.96%
• Maximum gradient: 27.36%
• Net elevation gain: 745 m
• Total ascent: 1019 m
• Category: 1

Alto del Chapetón rewards riders who respect its undulation. Pace to effort, gear for the 27.36% wall, and treat the 274 m of hidden re-ascent as part of the plan rather than a surprise.