Passo Coe

Overview

Passo Coe is a genuine hors catégorie climb, and the numbers make no apology for it. Over 17.8 km the road drags you from 179 m at the base to 1611 m at the summit, a net elevation gain of 1432 m. The average gradient sits at a brutal 8.04%, and there is very little respite baked into that figure — when a climb this long holds an average that steep, it means the easy stretches are rare and short. This is a sustained effort, not a puncheur's sprint.

The total ascent of 1405 m tells you the road climbs almost monotonically. With net gain of 1432 m against total ascent of 1405 m, there is effectively no rolling terrain giving anything back. What goes up stays up.

How the Gradient Unfolds

The defining trait of Passo Coe is consistency. An 8.04% average across 17.8 km leaves little room to hide, and the max gradient of 11.38% marks the steepest ramps rather than a lone spike. The gap between the 8.04% average and the 11.38% maximum is only 3.34 percentage points, which is telling: this climb doesn't lurch between flat and vertical. Instead it holds a steady, oppressive pitch, occasionally tipping toward that 11.38% ceiling on the harder pinches.

Practically, that means you will spend the entire ascent within a narrow band of effort. There is no long flat section to recover, no descent to coast. Treat every kilometre as a fresh instalment of the same demand.

Pacing Notes

On a climb this uniform, pacing is everything. Because the gradient rarely relents, going too hard early has an outsized cost — there is no soft section later to recover in. The disciplined approach is to settle into a sustainable power just below threshold and hold it.

Anchor your effort to your FTP. For an 8.04% wall lasting 17.8 km, most riders will want to sit a touch under FTP for the bulk of the climb, saving any surplus for the ramps near the 11.38% max. If you don't know your threshold, run the numbers through the FTP estimator before you plan a target. Getting that ceiling right is the difference between a strong summit and a blown one halfway up 1432 m of climbing.

Gearing

Gear for survival, not ego. With 17.8 km at 8.04% average and pitches touching 11.38%, a compact chainring paired with a wide cassette is the sensible baseline. A 34×32 will get most fit riders up while keeping cadence respectable on the steady middle section. If you weigh more, lack the specific climbing fitness, or simply want to spin rather than grind through 1432 m of gain, step up to a 34×34 for extra margin on the steepest ramps. On a climb with this little recovery, the lower gear pays for itself.

Summary

Passo Coe is a long, steady, unforgiving HC ascent. There are no tricks here — just 17.8 km of climbing at 8.04%, holding pace up to 11.38% on the worst pinches, and 1432 m of net gain standing between the 179 m base and the 1611 m summit. Pace it honestly, gear it generously, and respect the total ascent of 1405 m.

Length: 17.8 km
Average gradient: 8.04%
Max gradient: 11.38%
Start: 179 m
Summit: 1611 m
Net gain: 1432 m
Total ascent: 1405 m
Category: HC