Alto del Manantial

Alto del Manantial cycling climb profile

Alto del Manantial is an HC climb in Argentina, and the headline numbers explain why. It runs for 22.1 km, rises from 2151 m to 4594 m, and gains 2443 m in net elevation. The average gradient is 11.04%, with a maximum gradient of 25.22%.

That combination makes this less of a climb to attack and more of a climb to survive cleanly. A 22.1 km ascent is already a long effort, but the decisive point is the 11.04% average. There is no easy way to hide on a climb that steep for that long. Even before accounting for the 25.22% maximum pitch, the baseline demand is high enough that pacing errors made low on the climb will compound badly before the summit.

How the gradient unfolds

The available profile data does not give a detailed ramp-by-ramp breakdown, so it would be misleading to claim where the hardest section sits. What the numbers do show is the character of the climb from bottom to summit: sustained steep climbing, starting at 2151 m and finishing at 4594 m, with enough variation to include pitches far above the already severe average.

The key tactical point is that the 25.22% maximum is not just a nasty isolated figure. On a climb averaging 11.04%, those very steep ramps arrive on top of a workload that is already close to the upper limit for most riders. The risk is not one single wall. The risk is carrying too much intensity through the early kilometres, then hitting a sharper pitch with no room left to respond.

Pacing and gearing notes

Ride Alto del Manantial as a long threshold-management effort, not as a sequence of short ramps. The first priority is keeping torque under control. If you are grinding early, the climb will only get more expensive as the elevation gain stacks up.

Practical setup matters here:

• Use the easiest climbing gear you can justify, because a maximum gradient of 25.22% leaves little margin.
• Keep the opening effort below the level you would normally associate with a climb of this length, since the 11.04% average means there are few natural recovery points.
• Expect the steepest pitches to force short periods above your planned effort. The goal is to absorb them without turning the rest of the climb into damage control.
• Fuel and pace from the bottom, not once the climb starts to bite. With 2443 m of net elevation gain, small mistakes become large ones by the summit.

If riding by power, anchor the effort around sustainable climbing intensity rather than chasing speed. For riders using /glossary/ftp as a pacing reference, the smartest approach is conservative early control, then reassessment only when the summit is meaningfully closer. Alto del Manantial rewards restraint because the climb is hard before it ever reaches its hardest gradient.