Alto de Colpapampa

Alto de Colpapampa cycling climb profile

Alto de Colpapampa is a long, high-altitude Category 1 climb in PE, and the headline number tells the story clearly: 28.3 km at an average gradient of 4.94%. That average can look manageable on paper, but the scale of the effort is the real issue. This is not a short climb where a rider can bluff through a bad pacing choice. With 1397 m of net elevation gain from a start elevation of 2821 m to a summit at 4218 m, the climb rewards patience, controlled torque, and a willingness to ride under the limit for a long time.

How the gradient feels

The average gradient of 4.94% suggests a climb that is more sustained than brutally steep, but the maximum gradient of 10.42% changes the pacing equation. A climb with this length and that kind of upper-end ramp asks for two different efforts: efficient aerobic climbing for the bulk of the ascent, then enough reserve to handle the steeper sections without spiking too far above threshold.

The key is not to treat the moderate average as permission to ride aggressively early. Over 28.3 km, small surges compound. If the road repeatedly tilts above the average, those accelerations will pull more from anaerobic capacity than they appear to in the moment. The smarter ride is to let speed fall on the steeper pitches, keep pressure smooth, and avoid chasing a target pace that only makes sense on the gentler gradients.

Pacing strategy

The start elevation of 2821 m matters because the climb begins high and finishes much higher. Even without adding any assumptions beyond the profile, the basic pacing logic is clear: the climb gets more costly as fatigue accumulates and the summit sits at 4218 m. Riders who go too hard early are likely to pay for it before the top.

A good approach is to ride the opening portion at a restrained endurance-to-tempo feel, settle into a sustainable rhythm through the middle, then only lift the effort once the summit feels genuinely within reach. If using power, anchor the effort around sustainable climbing output rather than speed. If using feel, the right intensity is one where breathing is firm but controlled and cadence can stay consistent without grinding.

For more on setting sustainable effort, see /glossary/ftp and /tools/ftp-estimator.

Gearing notes

Because the climb averages 4.94% but reaches 10.42%, gearing should be chosen for the steepest ramps, not the average. A rider who only gears for the main gradient risks being forced into low-cadence grinding when the road pitches up. That is especially costly on a 28.3 km climb, where muscular fatigue can build long before the summit.

Choose a setup that allows seated climbing on the steeper sections while keeping the effort below panic mode. The goal is not to attack every ramp. It is to keep the climb boring for as long as possible: smooth cadence, stable breathing, and no unnecessary accelerations. Alto de Colpapampa is difficult because it keeps asking for work after the initial freshness is gone. Respect the length, save the legs for the upper half, and the profile becomes much more manageable.