Alto de Bogotá

Overview

Alto de Bogotá is a long, sustained category-1 ascent that rewards patience over punch. Across 21.6 km it lifts you from 536 m to a 1646 m summit, a net gain of 1110 m at an average gradient of 5.14%. The total ascent of 1223 m confirms what your legs will tell you: this is a climb with texture, where the road gives back a little before it takes more. With a steepest pitch of 9.67%, nothing here is savage in isolation — the difficulty lives in the accumulation, in holding a rhythm for well over an hour of continuous climbing.

How the Gradient Unfolds

The headline number is that 5.14% average, but averages flatten the story. The 1223 m of total ascent sits 113 m above the 1110 m net gain, which means the profile includes false flats and short descents that break the climb into segments rather than one unbroken wall. Expect the road to hover around and below the average for long stretches, then stiffen toward the 9.67% maximum on isolated ramps. Because the summit sits at 1646 m, the air thins as you climb — the final kilometres feel harder than the raw gradient suggests, even where the slope eases back toward that 5.14% mean.

Pacing Notes

On a climb this long, discipline beats ambition. Anchor your effort to your FTP and resist the urge to chase the early ramps — the 9.67% pitches are brief, and burning matches there costs you dearly across the remaining kilometres. Aim to ride the sustained sections just under threshold, letting the false flats within the 1223 m of total ascent serve as active recovery. If you're unsure of your numbers, run them through the FTP estimator before you start, then hold a wattage you can defend for the full 21.6 km. Even splits win here; a strong second half is far more attainable than salvaging a blown first.

Gearing

For a 21.6 km climb averaging 5.14% with ramps to 9.67%, prioritise a cadence-friendly setup over big-ring bravado. A compact chainring paired with a wide cassette is the sensible choice. A 34×32 low gear covers most riders comfortably on the sustained gradient, but if you weigh more, ride heavier equipment, or simply want insurance for the steep ramps at altitude near the 1646 m summit, step up to a 34×34. The extra range keeps your cadence spinning rather than grinding, which protects your legs over the full 1110 m of net climbing.

Summary

Alto de Bogotá is an endurance test dressed as a moderate climb: long, steady, and quietly demanding thanks to its altitude and its 1223 m of total ascent. Pace it evenly, gear it generously, and let the 21.6 km come to you.

Length: 21.6 km
Average gradient: 5.14%
Max gradient: 9.67%
Start: 536 m
Summit: 1646 m
Net gain: 1110 m
Total ascent: 1223 m
Category: 1