Alto de Matasano

Overview

Alto de Matasano is a genuine hors catégorie test, the kind of climb that leaves no room to hide. Over 9.5 km the road hauls you from a start elevation of 1299 m to a summit at 2276 m — a net gain of 977 m and a total ascent of 945 m once the minor undulations are counted. The headline number is the average gradient: 10.24%. That is not a figure you carry lightly for nine and a half kilometres. On most climbs a double-digit average is reserved for a short wall; here it is the sustained reality from bottom to top, which is exactly why this one earns the HC label rather than a category 1 tag.

How the Gradient Unfolds

The shape of Matasano is defined by relentlessness rather than a single decisive ramp. With a 10.24% mean and a maximum of 24.73%, the climb pairs a brutally high floor with an even more brutal ceiling. The gap between those two figures — a little over 14 percentage points — tells you the road pitches well above its own average in places, so the 24.73% spike is not an isolated hairpin but a warning of how steep the worst pitches get. Between those spikes the gradient rarely relaxes toward anything you could call recovery. Expect the pattern to be steep, steeper, steep again, all the way to 2276 m. Because the average sits so high, even the "easy" sections are steep enough to keep your heart rate pinned.

Pacing Notes

The only way to survive a 9.5 km climb averaging 10.24% is discipline in the first kilometre. Riders who chase the early pitches pay for it long before the summit. Anchor your effort to your sustainable power rather than the road: hold just under your FTP on the steady sections and let the 24.73% ramps push you briefly over, knowing they are short. If you do not know your ceiling, get a number first with the FTP estimator so you are pacing against reality, not optimism. Break the 977 m of climbing into thirds and treat each as its own effort — reaching the top with something left is the whole game on a climb this steep.

Gearing

Do not under-gear this one. A 10.24% average sustained for 9.5 km punishes any setup that leaves you grinding. A 34×32 is the sensible minimum for strong climbers, and even then the 24.73% pitches will have you out of the saddle at very low cadence. Most riders will be far happier on a 34×34, which buys precious extra spin on the steepest ramps and protects your legs across the full 977 m of gain. If your frame accepts it, an even wider cassette is no admission of weakness on an HC wall — it is the difference between riding to the summit and walking.

Summary

Alto de Matasano rewards patience, low gearing, and honest pacing. Respect the 10.24% average, brace for the 24.73% spikes, and ration your effort across all 977 m and you will reach 2276 m intact. Come in overcooked and the mountain collects the debt with interest.

Length: 9.5 km
Average gradient: 10.24%
Max gradient: 24.73%
Start: 1299 m
Summit: 2276 m
Net gain: 977 m
Total ascent: 945 m
Category: HC