Colle della Forcola

Overview

Colle della Forcola is an HC climb in Italy, and the numbers explain the category without any embellishment. Over 17.9 km the road lifts you from 713 m at the base to 2716 m at the summit — a net elevation gain of 2003 m. The average gradient is 11.2%, which is not a figure you see attached to long climbs very often. Most hors-catégorie ascents earn their rating through length or a handful of brutal ramps; the Forcola earns it by holding a double-digit slope for nearly its entire duration. There is nowhere on this climb where the math becomes kind.

How the Gradient Unfolds

An 11.2% average across 17.9 km means the climb is defined by consistency rather than spikes. The total ascent measured along the road is 1917 m, while the net gain from base to summit is 2003 m — the two figures sitting close together tells you the profile barely dips. There are almost no recovery flats or false descents to bank a breath on; the elevation you gain, you keep. Practically, expect a climb that starts steep and simply refuses to ease, with the thinning air above 2000 m compounding the effort as you approach 2716 m. Treat the whole thing as one sustained wall, not a series of separate pitches.

Pacing Notes

On a climb this uniform, pacing is everything. Because the gradient never relents, the temptation to push early is punishing — there is no easier upper section waiting to reward a fast start. Anchor your effort to a percentage of your FTP and hold it disciplined from the base. For a sustained effort of this length, most riders will want to sit just under threshold and stay there, accepting that 17.9 km at 11.2% will take a long time regardless of how hard you dig. If you are unsure of your current threshold, run the numbers through the FTP estimator before you plan a target for the day. Fuel and drink early; the altitude gain toward 2716 m makes late-climb mistakes expensive.

Gearing

Gear for survival, not for style. An average of 11.2% sustained over 17.9 km is exactly the terrain that overwhelms a standard compact setup. A 34×32 is the practical minimum here, and even strong climbers will be grateful for it on the steepest stretches. For most riders, and for anyone not racing, a 34×34 is the smarter choice — the extra range lets you keep your cadence up and your knees intact across a climb where you simply cannot spin out of trouble. If your bike can accept an even larger cassette, this is the climb to fit it for.

Summary

Colle della Forcola is a pure test of sustained climbing: long, unrelentingly steep, and topping out in genuinely high mountains. Come with low gears, a conservative pacing plan, and respect for the 2003 m you are about to gain.

Length: 17.9 km
Average gradient: 11.2%
Max gradient: n/a
Start: 713 m
Summit: 2716 m
Net gain: 2003 m
Total ascent: 1917 m
Category: HC