Alto de Iloca

Alto de Iloca cycling climb profile

Alto de Iloca is a short, concentrated climb in Chile: 2.4 km at an average gradient of 7.63%, rising from 15 m to 195 m. On paper, that makes it a Category 3 ascent, but the important detail is the relationship between the average and maximum gradients. With a listed maximum of 8.04%, the climb is not defined by a single violent ramp. It is defined by sustained pressure.

That changes how it should be ridden. A climb with a large gap between average and maximum gradient often rewards micro-pacing - backing off before the wall, then absorbing a sharp pitch. Alto de Iloca asks for something cleaner. The gradient sits close enough to 8% that the main risk is not being surprised by one section, but riding the first minute too hard and slowly bleeding speed before the summit.

How the climb feels

From a low start elevation of 15 m, the road gains 180 m by the summit at 195 m. Across only 2.4 km, that elevation gain arrives quickly. There is no statistical evidence here of long flatter benches or major gradient changes, so the best reading is a compact, steady effort where momentum matters but does not replace power.

At 7.63%, aerodynamic benefit fades and torque demand rises. Seated climbing will likely be the most efficient default for most riders, with short standing efforts used to reset position rather than to attack the slope. Because the maximum gradient is only slightly above the average, any surge above threshold is a choice, not a necessity.

Pacing and gearing

The correct pacing strategy is controlled from the bottom. Treat the opening as the part that protects the finish. If you ride this like a short punchy hill, the numbers are steep enough to punish the overreach. If you ride it like a longer climb, you may leave time on the road.

A good target is a hard, even effort just below the point where cadence starts to collapse. For riders using power, anchor the effort around your sustainable climbing output rather than reacting to every small change in feel. If you need a reference point, use your /glossary/ftp as the ceiling, not the starting gun.

Gearing should let you hold cadence at roughly 8% without grinding. An easier climbing gear is useful not because the climb is extreme, but because its steadiness gives you very few natural recovery points. Arrive at the final stretch with one gear still available and the climb becomes manageable. Arrive overgeared, and 2.4 km can feel much longer than it is.