Passo del San Gottardo

Overview

The Passo del San Gottardo is a hors catégorie (HC) climb, the hardest classification a road ascent can carry. Over 13.8 km it gains 1087 m of net elevation, rising from a start at 1021 m to a summit at 2108 m. The average gradient is a relentless 7.86%, and the road never really lets you settle: the steepest recorded pitch touches 16.77%. This is not a climb of a single hard section bolted onto easy road — it is a sustained effort that asks the same demanding question of your legs from bottom to top.

The recorded total ascent of 1065 m sits just below the net figure, which tells you the road climbs almost continuously, with negligible descending or flat recovery to give the number back.

How the Gradient Unfolds

At 7.86% average across 13.8 km, the San Gottardo offers very little in the way of respite. The gap between the average of 7.86% and the maximum of 16.77% is where the character lives: roughly 8.91 percentage points separate the typical grade from the worst of it, so the hardest ramps are more than double the average. Expect the road to sit in that upper-single-digit band for long stretches and then briefly spike toward that 16.77% figure before easing back down.

With 1087 m to gain and only 13.8 km to do it in, there is no hiding place. Think of it as a long, high effort rather than a series of walls with recovery between them.

Pacing Notes

On a climb this sustained, pacing is everything. Because the average gradient barely wavers from 7.86%, your best strategy is to hold a steady, repeatable effort rather than surging on the ramps toward 16.77% and blowing up. Anchor your effort to your FTP: most riders will want to sit at or just below threshold for a climb of roughly this length, keeping something in reserve for the steepest pitches.

If you are not sure of your current threshold, run the numbers through the FTP estimator before you plan the day. Knowing that figure turns 13.8 km at 7.86% from a guessing game into a manageable, measurable effort you can meter out from 1021 m all the way to 2108 m.

Gearing

For an HC climb averaging 7.86% over nearly 14 km with pitches to 16.77%, gear low and gear early. A compact 34-tooth inner ring is the sensible starting point. Pair it with a wide cassette: a 34×32 will get most fit riders up at a workable cadence, but on a climb this sustained — with 1087 m of gain and no flat to recover on — many riders will be far happier with a 34×34. That extra sprocket keeps your cadence up on the 16.77% ramps and protects your legs across the full 13.8 km. If your bike can take it, err toward the easier ratio; you will never regret a spare gear on the San Gottardo.

Summary

The Passo del San Gottardo is a true HC test: sustained, steep, and unforgiving from 1021 m to 2108 m. Pace it to your threshold, gear it low, and respect the fact that 7.86% average over 13.8 km never really eases.

Length: 13.8 km
Average gradient: 7.86%
Max gradient: 16.77%
Start: 1021 m
Summit: 2108 m
Net gain: 1087 m
Total ascent: 1065 m
Category: HC