Passo Zevola

Overview

Passo Zevola is an HC climb — hors catégorie, the hardest rating there is — and the numbers explain why. Over just 9.6 km it averages a savage 12.16%, hauling you from a start elevation of 677 m up to a 1839 m summit. That is 1162 m of net elevation gain packed into a climb barely longer than a warm-up, with a total ascent of 1150 m once you account for the shape of the road. There is nothing gentle here: this is a wall dressed up as a mountain pass, and every kilometre demands respect.

How the Gradient Unfolds

A 12.16% average over 9.6 km is the headline, but averages hide as much as they reveal. On a climb this steep, the flatter kilometres — if they exist at all — are still hard, and anything above the mean tips into the territory where staying seated becomes a negotiation with traction and cadence. Expect the gradient to sit stubbornly in double digits for long stretches, offering few genuine recoveries. With 1162 m of net gain to give away, the road simply keeps rising. The mental model is a straight line pointed at the sky: no rolling relief, no false flats to spin out, just sustained steepness from 677 m all the way to 1839 m.

Pacing Notes

The cardinal rule on a 12.16% average is to pace from the bottom, not the top. Ride the first few kilometres well within yourself, because there is no margin to recover once you go into the red on a climb this steep. Anchor your effort to your FTP: on a sustained HC effort of roughly 9.6 km, most riders should target something just below threshold and hold it, resisting the urge to surge on any brief easing of the slope. If you do not know your threshold number, run the numbers through the FTP estimator before you go — knowing your ceiling turns a guessing game into a plan. Keep your cadence as high as the gradient allows, and let smooth, even power carry you across all 1162 m of gain.

Gearing

This is a climb where gearing is not a luxury — it is survival. A 12.16% average sustained for 9.6 km will grind through anything too tall, so err heavily toward the low end. A compact chainring paired with a wide cassette is the minimum sensible setup. A 34×32 will get many riders up, but on a slope this relentless most people will be far happier with a 34×34, which buys you the extra cadence room to keep spinning rather than lurching. If your frame and derailleur can take an even larger sprocket, take it — you will never regret spinning too easily on a wall like this.

Summary

Passo Zevola is short, steep, and uncompromising: an HC climb that trades length for pure vertical brutality across 9.6 km. Pace it conservatively, gear it low, and let the numbers set your expectations before the road does.

Length: 9.6 km
Average gradient: 12.16%
Max gradient: n/a
Start: 677 m
Summit: 1839 m
Net gain: 1162 m
Total ascent: 1150 m
Category: HC