Forcella Valtrigona

Overview

Forcella Valtrigona is a genuine hors catégorie monster. Over 16.9 km it averages 10.63%, dragging you from a valley floor at 358 m all the way to a summit at 2156 m. That is 1798 m of net elevation gain, with 1741 m of total ascent packed into a climb that almost never relents. There is no easing-in gradient here: a double-digit average over nearly 17 km means the climb asks a serious, sustained effort from the first pedal stroke to the last. Add a max gradient of 33.2% and you have a route that punishes any rider who arrives underprepared or overgeared.

How the Gradient Unfolds

The defining number is that 10.63% average held across 16.9 km. On most climbs a steep average hides gentle stretches that offset a few brutal ramps, but with so little difference between the net gain of 1798 m and the total ascent of 1741 m, there is almost no descending or flat recovery to be found. The road simply keeps rising. Where it spikes to 33.2%, the gradient more than triples the average, so expect sudden walls that force you out of rhythm. Treat those pitches as isolated efforts: get over them, then settle straight back into your climbing tempo rather than chasing lost time.

Pacing Notes

Pace this one by power, not ego. A climb of 16.9 km at 10.63% will take most riders well over an hour, so riding above threshold early is a fast route to blowing up before the summit at 2156 m. Anchor your effort to your FTP and hold a percentage of it you can sustain for the full duration. If you are unsure of your number, run a quick check with the FTP estimator before you start.

Keep something in reserve specifically for the 33.2% ramps. When the road kicks that steeply, your power will surge whether you like it or not, so soft-pedal into each wall and avoid burning matches you will need higher up. The 1798 m of climbing means fatigue accumulates relentlessly, and the final third is where good pacing pays off.

Gearing

Gear for survival, not pride. With a 10.63% average and pitches touching 33.2%, this is not a climb to attempt on a compact-plus-close-cassette setup. A 34×32 is the bare minimum many strong climbers should consider, and even then the steepest ramps will have you grinding at very low cadence. For most riders, 34×34 is the smarter choice, giving you a fighting chance of spinning rather than lurching up the worst pitches. Over 16.9 km and 1741 m of ascent, protecting your knees and your rhythm with an easier gear will almost always get you to 2156 m faster than muscling a bigger ratio.

Summary

Forcella Valtrigona is a full-value HC ascent: long, unrelentingly steep, and topped with walls that demand respect. Pace by power, gear low, and treat the summit as a reward earned over nearly 17 km of climbing.

Length: 16.9 km
Average gradient: 10.63%
Max gradient: 33.2%
Start: 358 m
Summit: 2156 m
Net gain: 1798 m
Total ascent: 1741 m
Category: HC