Sella del Mortirolo

Overview

The Sella del Mortirolo is a Category 1 ascent in Italy, stretching 15.7 km from an elevation of 197 m to a summit at 1270 m. Over that distance it delivers a net elevation gain of 1073 m at an average gradient of 6.82%. On paper that average reads as steady tempo climbing, but the profile is far more demanding than a single number suggests.

The gap between the net gain of 1073 m and the total ascent of 1858 m tells the real story. That 785 m difference is climbing you do twice — meters you gain, give back on descents and false flats, then have to earn again. The road undulates rather than rising cleanly, so your legs pay for far more vertical than the net figure implies. Treat this as an 1858 m effort, not a 1073 m one.

How the Gradient Unfolds

The 6.82% average is diluted by every recovery section and downhill on the route. Averages smooth over the pitches that actually hurt, and here the sharp end is severe: the steepest ramp hits 27.13%. That is a gradient you cannot ride at tempo — it forces you out of the saddle or into your easiest gear immediately.

Across the profile, expect:

• Flatter and recovery sections that pull the average down and tempt you into overcooking the middle
• Repeated short climbs separated by descents, each one re-warming the legs from cold
• A brutal steepest ramp around 27.13% where power spikes and cadence collapses

Pacing Notes

Because of the undulation, even-speed pacing is a trap on the Mortirolo — chasing a constant km split means burning matches on every ramp and coasting the descents. Pace to effort instead. Hold a steady sustainable power output through the climbs and let your speed vary with the terrain, backing off slightly before the steepest sections rather than exploding on them.

Anchor that effort to a real number. Use the FTP estimator to set your threshold, then ride the sustained pitches just below it, leaving headroom for the 27.13% ramp where you will unavoidably go into the red.

Gearing

Gearing here is governed by that steepest gradient, not the average. At 27.13% you need spinning gears, not grinding ones. Run a compact or sub-compact chainset paired with a wide-range cassette — a 34×32 at minimum, and 34×34 if your setup allows it. Anything narrower leaves you mashing a big gear at low cadence exactly when your legs are already overloaded. Check your chainset and cassette before the ride; the wrong ratio turns a hard climb into an unfinishable one.

Summary

• Length: 15.7 km
• Average gradient: 6.82%
• Maximum gradient: 27.13%
• Net elevation gain: 1073 m
• Total ascent: 1858 m
• Category: 1

The Sella del Mortirolo rewards riders who respect the difference between its net gain and its total ascent. Gear low, pace to effort, and save something for the 27.13% ramp — do that, and the summit at 1270 m is yours.