Jeuf de Fascia - Giogo di Fassa

Overview

The Jeuf de Fascia - Giogo di Fassa is a genuine hors catégorie (HC) test, the hardest classification on the scale ahead of categories 1 through 4. Over 29.2 km it lifts you from a valley floor at 368 m to a summit at 2305 m, a net elevation gain of 1937 m. Because the road rolls and dips rather than climbing in one clean line, the total ascent is actually 2060 m — roughly 123 m of hidden re-climbing folded into the day. The average gradient reads 6.64%, but that headline number hides pitches as steep as 17%. This is a climb measured in patience: nearly 30 kilometres of near-continuous elevation, the kind of effort where the summit is a rumour for the first hour.

How the Gradient Unfolds

Averaging 6.64% across 29.2 km means the climb never truly relents, but it is far from uniform. The gap between the 6.64% average and the 17% maximum tells the story — expect long stretches sitting close to the mean, punctuated by ramps that spike to more than double it. With 2060 m of total ascent against a 1937 m net gain, there are also short false descents that break the rhythm and cost you re-earned metres. Think of it in thirds: a valley approach that eases you in near 368 m, a relentless middle where the average bites, and an upper section thinning toward the 2305 m summit where altitude compounds the gradient. The 17% ramps are where races are decided and where an overcooked start comes back to haunt you.

Pacing Notes

On a climb this long, discipline beats bravado. Your FTP is the anchor: settle into a sustainable percentage of it for the 6.64% sections and consciously back off — not surge — when the road pitches toward 17%. Powering over every steep ramp early will empty the tank long before 2305 m. If you don't know your threshold, run the numbers through the FTP estimator before you commit, then build your target zones around it. A useful mental model: the 1937 m of net gain is the work you must do; the extra 123 m hidden inside the 2060 m total ascent is the tax on top. Ride the average, respect the maximum, and keep something in reserve for the final kilometres where thin air makes every watt cost more.

Gearing

An HC climb of 29.2 km at 6.64% with 17% ramps demands a wide, low spread. A compact 34-tooth inner chainring is the sensible starting point. Pair it with at least a 34×32 for the sustained gradient, and if you climb at a lower cadence, run out of legs on long days, or simply want insurance for the 17% pitches near a 2305 m summit, step up to 34×34. The extra sprockets buy you cadence, and cadence buys you endurance over 2060 m of total ascent. There is no prize for grinding a gear too tall for two-plus hours of climbing — spin it out.

Summary

The Jeuf de Fascia - Giogo di Fassa is a long, honest HC climb that rewards measured effort over raw ambition. Nearly 30 kilometres, almost 2000 m of net gain, and ramps that bite hard — it is a summit you earn one steady kilometre at a time.

Length: 29.2 km
Average gradient: 6.64%
Max gradient: 17%
Start: 368 m
Summit: 2305 m
Net gain: 1937 m
Total ascent: 2060 m
Category: HC