Forcola di Valmora

Overview

Forcola di Valmora is a hors catégorie (HC) climb, the hardest rung on the categorization ladder before you run out of numbers entirely. It stretches 23.8 km from a valley floor at 433 m all the way up to a summit of 2006 m. That is a net elevation gain of 1573 m, though the total ascent of 1652 m tells you the road does not climb in one clean, uninterrupted line — there are dips and false flats that add work without adding altitude.

At 6.62% average gradient, the climb looks moderate on paper, but averages lie on a road this long. The 21.62% maximum tells the real story: somewhere on this ascent the tarmac tilts into wall-territory, and you will need to have saved something for it.

How the Gradient Unfolds

Do the arithmetic and the shape becomes clear. With 1652 m of total ascent but only 1573 m of net gain, roughly 79 m of climbing is "wasted" on sections that give elevation back before demanding it again. Expect ramps that surge above the 6.62% mean, punctuated by brief recoveries where the grade eases.

The headline hazard is that 21.62% pitch. A ramp more than three times the average gradient cannot be spun over casually — it forces you out of rhythm, spikes your heart rate, and punishes anyone who has burned matches early. The smart read is to treat the average as a decoy and prepare instead for a climb of sharp contrasts across its full 23.8 km.

Pacing Notes

On a climb this long, pacing is everything. Anchor your effort to your FTP: for a sustained 23.8 km ascent you should be sitting comfortably below threshold for the bulk of it, holding a tempo you could sustain for well over an hour. If you do not know your threshold number, run it through the FTP estimator before you commit to a target.

The mistake here is pushing hard on the earlier, gentler slopes and arriving at the steep ramps already in the red. Bank patience early. Keep a reserve for the 21.62% wall, because there is no gradient at which grinding a monster gear at low cadence feels good.

Gearing

This is a climb that rewards low gearing and light gears turned quickly. A compact 34-tooth chainring paired with a wide cassette is the baseline. A 34×32 will get most fit riders up the sustained 6.62% sections, but the 21.62% maximum is where a 34×32 can leave you mashing.

If you have any doubt about your climbing legs, fit a 34×34. That extra sprocket buys you cadence exactly where the road tries to stall you, and over 23.8 km and 1652 m of total ascent, protecting your knees and your rhythm is worth more than saving a few grams.

Summary

Forcola di Valmora is a proper HC test: long, tall, and spiked with a brutal maximum ramp. Respect the length, gear low, pace off your threshold, and save something real for the steep pitches.

Length: 23.8 km
Average gradient: 6.62%
Max gradient: 21.62%
Start: 433 m
Summit: 2006 m
Net gain: 1573 m
Total ascent: 1652 m
Category: HC