Passo di Pila

Overview

Passo di Pila is a hors catégorie climb, the hardest classification there is, and its numbers explain why. Over 13.5 km it averages 13.25%, hauling you from a start elevation of 736 m to a summit of 2526 m. That is 1790 m of net elevation gain against 1756 m of total ascent — a ratio that tells you almost the entire climb points relentlessly upward, with barely any respite or descending to interrupt the effort.

A double-digit average sustained across 13.5 km is rare air. Most famous climbs earn their reputation on far gentler mean gradients. Here the difficulty is not a single ramp but the sheer duration of a slope that would leave many riders grinding on any single kilometre, repeated more than thirteen times over.

How the Gradient Unfolds

With a 13.25% average, there is nowhere to hide. The tiny 34 m gap between the 1790 m net gain and the 1756 m total ascent means the road almost never gives anything back — no long false flats, no downhill breathers to spin the legs loose. Whatever the road throws at you, it stays steep.

Expect the effort to feel front-loaded in your mind and back-loaded in your legs. The first kilometres set a rhythm you cannot really escape, and because you finish at 2526 m, thinning air compounds the fatigue as you climb higher. Treat the whole 13.5 km as one continuous wall rather than a series of distinct sections.

Pacing Notes

On a climb this uniform, pacing is everything. A 13.25% average sustained for 13.5 km will punish anyone who starts above their sustainable ceiling. Anchor your effort to your FTP and hold a power you know you can defend for the full duration — going even slightly too hard early will cost you far more than it gains.

If you are unsure where your ceiling sits, run the numbers through the FTP estimator before you commit to a target. Then ride to that number, not to the wheel in front of you. The gradient does the selecting; your job is simply to keep turning the pedals at a repeatable intensity from 736 m all the way to 2526 m.

Gearing

This is a climb that rewards gearing you might otherwise consider overkill. At 13.25% for 13.5 km, cadence collapses fast on anything too tall, so err generously toward the easy end.

A compact 34×32 is the sensible floor — it lets most riders keep the cranks moving without lurching into grinding, muscle-tearing torque. But given the sustained severity, a 34×34 is the smarter choice for the majority. That single extra sprocket buys you a lower minimum speed and a higher spinnable cadence, which over 1790 m of climbing translates directly into preserved legs near the 2526 m summit. If your frame and derailleur clear it, take the 34×34.

Summary

Passo di Pila is a pure test of sustained climbing: 13.5 km that never relents, averaging 13.25% and topping out at 2526 m. Pace it conservatively, gear it generously, and respect the hors catégorie label — it is earned honestly here.

Length: 13.5 km
Average gradient: 13.25%
Max gradient: n/a
Start: 736 m
Summit: 2526 m
Net gain: 1790 m
Total ascent: 1756 m
Category: HC