Paso de la Florida

Overview

Paso de la Florida is a hors catégorie (HC) climb, the hardest classification a road ascent can earn, and its numbers explain why. Over 10.7 km the road climbs from 1525 m to a 2661 m summit, a net gain of 1136 m at an average gradient of 10.57%. That average alone would make most riders wince — a climb that never lets up for more than ten kilometres, sitting stubbornly above ten percent from bottom to top. There is no false flat to hide in, no long descent to recover the numbers. The total ascent of 1112 m confirms it: what you climb, you keep.

How the Gradient Unfolds

The defining trait here is consistency layered with cruelty. A 10.57% average across 10.7 km means the road rarely dips into anything you would call gentle, and the 29.09% maximum gradient tells you where it turns brutal. That max is nearly three times the average — a wall-like ramp that will spike your heart rate and force you out of any rhythm you have built. Because the net gain (1136 m) slightly exceeds the total ascent figure (1112 m), you can expect the grade to hold its punishing character almost the entire way rather than pooling into one or two isolated spikes. Treat every steep pitch as a discrete effort and the smoother sections between them as your only chance to breathe.

Pacing Notes

On a climb this long and this steep, pacing is everything. Ride the first kilometre well under threshold — the 29.09% ramps ahead will demand reserves you cannot spend early. A sustainable target for most riders is to hold just below their FTP for the length of the climb, treating the steepest ramps as short surges you accept will push you briefly over. If you do not know your threshold power, estimate it first with the FTP estimator so your pacing plan is grounded in real numbers rather than guesswork. With over 1100 m of vertical to grind through, going out too hard in the first third is the single most common way to blow up before the 2661 m summit.

Gearing

Do not under-gear this one. A 10.57% average sustained for 10.7 km, punctuated by pitches near 29.09%, punishes anyone caught in too big a ratio. A 34×32 is the sensible minimum for strong climbers, giving you a bailout for the steady grind. But given the maximum gradient, most riders will be far happier on a 34×34, which keeps your cadence turning on the worst ramps instead of forcing a grinding, knee-straining slog. If your bike accepts an even wider cassette, it will not go to waste on a climb that gains 1136 m without relief.

Summary

Paso de la Florida is a pure test of climbing endurance: 10.7 km that never eases, an average that stays in double digits, and ramps that touch 29.09%. Pace it conservatively, gear it generously, and respect the full 1136 m of vertical between you and the top.

Length: 10.7 km
Average gradient: 10.57%
Max gradient: 29.09%
Start: 1525 m
Summit: 2661 m
Net gain: 1136 m
Total ascent: 1112 m
Category: HC