Alto de Los Pejerreyes

Alto de Los Pejerreyes cycling climb profile

Alto de Los Pejerreyes is a 9.1 km category 2 climb in Chile, rising from 1253 m to 1693 m. The headline average of 4.84% makes it look controlled rather than brutal, but the maximum gradient of 13.38% changes how it should be ridden. This is not a climb to judge only by the average.

Over the full distance, the road gains 440 m from start to summit. That points to a steady aerobic effort if the gradient were uniform, but a double-digit maximum means the profile contains at least one section that is much harder than the climb’s overall character suggests. The practical takeaway is simple: the average invites tempo, while the steepest ramps punish overconfidence.

How the gradient unfolds

The available profile data gives the full climb shape rather than split-by-split detail: 9.1 km at 4.84%, with pitches reaching 13.38%. That means the safest read is to treat Alto de Los Pejerreyes as a moderate-length climb with variable resistance. The bottom-to-summit gain is large enough to make pacing matter, but not so long that it becomes a pure endurance grind.

The danger zone is any steep ramp hidden inside the average. On a climb like this, a rider who locks into threshold too early can be forced above sustainable power when the road kicks up. That matters because a short 13.38% section can spike torque, disrupt cadence, and turn a smooth climb into repeated anaerobic surges if the gearing is too ambitious.

Pacing and gearing notes

Start below your target climbing effort, especially if riding by /glossary/ftp. The first priority is keeping enough headroom for the steepest ramps. If the climb feels easy early, that is not a signal to push straight to the limit. It is a signal that the average gradient is doing what averages do - hiding the cost of the harder sections.

A compact climbing gear is sensible here. The 4.84% average does not demand an extreme setup, but the 13.38% maximum argues for a low enough gear to stay seated and keep cadence from collapsing. If you are forced into a slow grind on the steepest pitch, the cost is not just muscular. It also makes it harder to settle back into rhythm once the road eases.

For a strong, even ride, pace Alto de Los Pejerreyes as a controlled category 2 effort: steady pressure on the moderate sections, no chasing speed on the shallower gradients, and deliberate restraint before anything that looks like a wall. The summit comes after 9.1 km, so the winning strategy is not aggression from the base. It is preserving rhythm until the final third, then spending what is left once the ramps have shown themselves.