Paso de Yanashallash

Paso de Yanashallash cycling climb profile

Paso de Yanashallash is a long, high Peruvian climb that asks for control more than raw violence. The road runs for 19.7 km from 3543 m to 4322 m, gaining 779 m and averaging 3.96%. On paper, that average can look manageable. In practice, the combination of duration and elevation is what makes the climb worth respecting.

This is not a climb defined by repeated walls. The maximum gradient is 7.47%, which suggests the hardest ramps are sharp enough to disturb rhythm but not so steep that they completely rewrite the effort. The key is that the climb starts already high and finishes higher still. Even if the gradient stays mostly moderate, the cost of each acceleration rises as the summit gets closer.

How the gradient unfolds

With an average just under 4% and a maximum below 8%, Paso de Yanashallash profiles as a steady category 2 ascent rather than a punchy, leg-breaking climb. The bottom-to-summit story is likely shaped by accumulation: a long drag where small changes in slope matter because there is limited room to recover without giving away speed.

That means the climb should be ridden less like a short threshold test and more like an extended aerobic climb with controlled pressure on the pedals. The difference between riding this well and riding it poorly will not come from surviving one steep section. It will come from avoiding a slow fade over the final kilometres after spending too much too early on gradients that felt deceptively easy.

Pacing notes

Start below the effort you think the average gradient deserves. At 3.96%, it is tempting to ride on feel and let speed dictate the work, but the elevation makes that risky. Use power if available, and keep the opening phase a touch under sustainable climbing effort rather than chasing momentum.

A sensible pacing strategy is:

• Settle early and avoid surges on the first ramps
• Keep cadence stable when the road tilts toward the 7.47% maximum
• Treat the middle of the climb as the decisive pacing zone, not a place to drift
• Save any sustained lift in effort for the approach to 4322 m, when the altitude is highest

If using /glossary/ftp as a reference, this is the type of climb where riding just under your sustainable threshold early can be faster than touching threshold repeatedly and paying for it later.

Gearing notes

The gradient does not demand extreme climbing gearing on paper, but the length and altitude argue for a forgiving setup. You want enough range to keep cadence from collapsing on the steeper ramps without having to spike torque. A gear that feels slightly too easy near the bottom may be exactly what keeps the effort smooth near the summit.

For performance, the priority is not attacking the steepest pitch. It is keeping the climb boring for as long as possible: steady breathing, steady cadence, steady power, and no unnecessary accelerations. Paso de Yanashallash rewards the rider who understands that a moderate gradient at high elevation is still a serious endurance problem.