Vigiljoch

Overview

Vigiljoch is a hors catégorie climb, the hardest classification a road ascent can carry, and its numbers explain why. Over 16.4 km the road drags you from a start elevation of 323 m up to a summit of 1761 m, a net gain of 1438 m. The average gradient across that whole distance is a punishing 8.78%, and it never gives you a flat kilometre to recover on. This is not a climb that eases you in and then bites; it bites from the base and holds its grip the entire way. If you want a benchmark for sustained climbing power, few HC efforts are as unrelenting.

How the Gradient Unfolds

The defining feature here is consistency at a brutal level. An 8.78% average over 16.4 km means there is very little respite baked into the profile. The total ascent of 1425 m sits just below the net gain of 1438 m, telling you the road climbs almost monotonically with barely any descending or false-flat interruption. What breaks the rhythm is the steepness of the hardest ramps: the gradient peaks at 18.33%, more than double the average. Those pitches are where the climb turns from hard to savage, forcing you out of the saddle or deep into your reserves. Expect the pattern to alternate between long sustained walls near the average and short, sharp kicks toward that 18.33% maximum.

Pacing Notes

The only way to survive 16.4 km at 8.78% is discipline in the first third. Riders who attack the lower slopes almost always pay for it before the summit. Anchor your effort to your FTP and aim to sit at or just below threshold, saving headroom for the ramps toward 18.33% where power spikes are unavoidable. If you do not know your threshold, run the numbers through the FTP estimator before you plan a target. On a climb this long, a steady sustainable wattage will beat a surging one every time, because there is no flat section to recover the debt you build early.

Gearing

At 8.78% average with pitches to 18.33%, gearing is not a place to be brave. For most amateur riders a compact 34-tooth inner chainring paired with a wide cassette is essential. A 34×32 is the sensible baseline and will let you spin the sustained sections without grinding, but on the steepest ramps toward the maximum gradient many riders will want more. If your legs or your fitness on the day leave any doubt, fit a 34×34 and thank yourself on the walls. The lower ratio protects your cadence, and a protected cadence is what gets you to 1761 m with something left.

Summary

Vigiljoch is a true HC test: long, steep, and almost mercilessly consistent, with a net climb of 1438 m over 16.4 km and ramps that punch to 18.33%. Pace it conservatively, gear it generously, and respect the average, and the summit at 1761 m is within reach.

Length: 16.4 km
Average gradient: 8.78%
Max gradient: 18.33%
Start: 323 m
Summit: 1761 m
Net gain: 1438 m
Total ascent: 1425 m
Category: HC