Colle Esischie

Overview

Colle Esischie is a genuine hors catégorie effort, and the raw numbers make no attempt to hide it. Across 22.5 km the road climbs from 736 m at the base to 2479 m at the summit — a net elevation gain of 1743 m at an average gradient of 7.75%. The total ascent, accounting for the few brief respites where the road eases, comes to 1718 m. That difference between net gain and total ascent tells you this is a climb that mostly points relentlessly upward, with very little false flat or descent to break the rhythm.

At more than twenty kilometres of sustained effort, Esischie sits firmly in the tier of climbs where pacing matters more than power. The 15.48% maximum gradient is steep enough to punish anyone who arrives at it already over their limit.

How the Gradient Unfolds

The defining characteristic here is duration. A 7.75% average sustained over 22.5 km means there is nowhere to truly recover — the climb simply keeps taking. With the maximum touching 15.48%, roughly double the average, the profile is not uniformly steep but instead layers stiff pitches over a punishing baseline. Expect stretches close to the average that let you settle into a cadence, interrupted by ramps that force you out of that rhythm and up toward or past the maximum.

Because total ascent (1718 m) sits just below net gain (1743 m), you can read the shape as near-monotonic: what goes up largely stays up. Altitude is a factor too. Finishing at 2479 m — roughly 1743 m above where you started — means the final kilometres are ridden in thinner air, where any effort above threshold costs more than it would lower down.

Pacing Notes

Treat Esischie as a threshold exercise, not a series of accelerations. Your FTP is the anchor: on a climb this long, riding a few percent above it for even a couple of kilometres will cost you far more later, especially as you climb past 2000 m toward the 2479 m summit. Aim to sit just under threshold on the average-gradient sections and accept that the 15.48% ramps will spike you briefly above it — that is unavoidable, so keep those surges short and controlled.

If you are unsure where your threshold sits, run the numbers through the FTP estimator before you commit to a target. Banking energy in the first third pays dividends across the remaining kilometres.

Gearing

Gear for the maximum, not the average. On a 22.5 km climb that averages 7.75% and spikes to 15.48%, an under-geared bike turns a hard day into a survival exercise. A 34×32 is the sensible floor for strong climbers who can hold a solid cadence on the steep pitches. For most riders — and for anyone tackling the thin-air final kilometres near 2479 m with tired legs — a 34×34 is the wiser call, giving you the spin to protect your legs on the 15.48% ramps without grinding to a stall.

Summary

Colle Esischie is a long, steep, high-altitude HC climb that rewards patience and respects no one who starts too fast. Gear low, pace to threshold, and let the 1743 m of vertical come to you one kilometre at a time.

Length: 22.5 km
Average gradient: 7.75%
Max gradient: 15.48%
Start: 736 m
Summit: 2479 m
Net gain: 1743 m
Total ascent: 1718 m
Category: HC