Alto de La Mata

Overview

Alto de La Mata is one of those climbs whose numbers read like a typo. Over just 6.6 km it averages 16.83%, dragging you from a start elevation of 1356 m to a summit at 2462 m. That is a net gain of 1106 m in the space of a single, unrelenting effort — the kind of average gradient that most riders never see outside of a driveway. It is rated HC, hors catégorie, the hardest classification there is, and it earns the label honestly. There is no easing in, no valley run-up to build rhythm. La Mata simply points uphill and stays there.

How the Gradient Unfolds

The defining feature of La Mata is its refusal to relent. A 16.83% average across 6.6 km means there are effectively no recovery sections — where most climbs bury their steepest ramps between flatter breathers, here the whole road is the steep ramp. The maximum pitch touches 30.39%, a gradient at which staying upright and turning the pedals become the same problem. Note too that the total ascent, 1063 m, sits just below the net elevation gain of 1106 m: this is a climb that goes up and only up, with essentially no downhill or false-flat give-back along the way. Every metre you climb, you keep.

Pacing Notes

On a climb this steep, pacing is less about tactics and more about survival math. Your power will be pinned near or above threshold from the first pedal stroke, so knowing your FTP is essential — it tells you what you can actually hold versus what will blow you apart in the opening kilometre. If you are not sure of your number, run the FTP estimator before you commit to La Mata. Aim to settle into a repeatable effort you can sustain across the full 6.6 km rather than chasing an early split. When the road bucks toward 30.39%, expect surges well above threshold; accept them, then claw the effort back down the moment the pitch relents even slightly.

Gearing

Do not underestimate the gearing you need here. A 16.83% average with ramps to 30.39% will punish anything too tall. A compact 34-tooth chainring paired with a 32-tooth cassette sprocket — a 34×32 — is the sensible floor, and even then many riders will wish for more. If your rear derailleur can handle it, go to a 34×34; that extra sprocket buys you cadence and keeps your knees intact on the worst pitches. For a climb gaining 1106 m at this gradient, easier is almost always the right call.

Summary

Alto de La Mata is a pure test of climbing at its most extreme: short, savage, and utterly without mercy. If you can hold a steady effort and you have brought low enough gears, the summit at 2462 m is a genuine trophy. Respect the numbers and they will respect you back.

Length: 6.6 km
Average gradient: 16.83%
Max gradient: 30.39%
Start: 1356 m
Summit: 2462 m
Net gain: 1106 m
Total ascent: 1063 m
Category: HC