Alto El Raso

Overview

Alto El Raso is a short climb only on paper. Across 5.3 km it averages a savage 12.16%, lifting you from a start elevation of 349 m to a summit at 988 m. That is a net gain of 639 m in barely five kilometres — the kind of ratio that turns a climb from a test of endurance into a test of raw power-to-weight. With 615 m of total ascent packed into its length, there is almost nowhere to hide and almost no descending to recover ground. This is a Category 1 ascent, one rung below hors catégorie, and it earns that ranking through sustained steepness rather than sheer distance.

How the Gradient Unfolds

The defining feature of Alto El Raso is that its average gradient of 12.16% is not softened by long shallow stretches. When a climb gains 639 m of elevation over 5.3 km and posts 615 m of measured ascent, the two figures sitting so close together tell you the road climbs almost continuously — there is very little rolling terrain to average out the punishing sections. Expect a wall-like feel from early on, with double-digit gradients as the baseline rather than the exception. Because the numbers leave no room for genuine recovery flats, you should treat the entire 5.3 km as a single sustained effort rather than a climb with distinct easy and hard phases.

Pacing Notes

On a climb this steep and this short, pacing discipline matters enormously. A 12.16% average means you cannot coast through the hard bits, so the temptation to attack the lower slopes must be resisted. Anchor your effort to your sustainable threshold: your FTP is the ceiling you want to sit just under for the full 5.3 km, because there is no flat section where an overcooked start can be repaid. If you do not have a recent number, run through the FTP estimator first, then set a target power you can hold for the roughly 20 to 30 minutes this climb will demand. Start a notch below what feels comfortable — on gradients this steep, momentum vanishes the instant you overreach, and clawing it back costs far more than it saves.

Gearing

Gearing is not a luxury here; it is the difference between spinning and grinding to a stop. With a 12.16% average over 5.3 km, most riders will want the largest sprocket they can fit. A compact 34-tooth chainring paired with a 34×32 setup is the practical minimum, and even strong climbers will be grateful for every tooth of it. If your legs or your fitness are anything short of exceptional, step up to a 34×34 — the extra range keeps your cadence alive through the steepest ramps and protects your knees over a sustained 639 m of climbing. On a wall like Alto El Raso, easier gearing is faster gearing, because it lets you hold a rhythm instead of surging and stalling.

Summary

Alto El Raso is a concentrated, uncompromising Category 1 climb: 5.3 km that never relents, a 12.16% average that punishes every mistake, and 639 m of net elevation delivered with almost no respite. Come with low gears, a disciplined plan, and respect for the numbers.

Length: 5.3 km
Average gradient: 12.16%
Max gradient: n/a
Start: 349 m
Summit: 988 m
Net gain: 639 m
Total ascent: 615 m
Category: 1