Puerto de Malagosto

Overview

Puerto de Malagosto is a Category 1 climb in Spain (ES), running 15.6 km from a start elevation of 1,118 m to a summit at 1,952 m. Over that distance it delivers 834 m of net elevation gain at an average gradient of 5.34%. On paper that average reads as moderate, but the category rating tells you the sustained work here is significant, and the summit altitude means the final kilometres come with thinner air.

The number that reshapes your expectations is the gap between net gain and total ascent. You climb 834 m net, but the total ascent is 1,167 m. That 333 m difference is undulation: sections where you give back elevation and have to earn it again. The road is not a smooth ramp. You will crest false summits, descend, and re-climb, which means the true climbing load is roughly 40% more than the net figure suggests, and rhythm is harder to hold than the average implies.

How the Gradient Unfolds

The 5.34% average is a blended figure that hides both easier valleys and sharp ramps. The maximum gradient touches 27.55%, a wall-like pitch far beyond anything the average prepares you for. Because of the 333 m of undulation, the steep sections are interrupted by flatter or descending stretches that reset your legs but break your cadence.

• Recovery sections where the road flattens or drops, giving back part of the elevation
• Repeated short climbs that re-take that lost height, the signature of an undulating profile
• The steepest ramp at 27.55%, a brief but brutal pitch that demands your lowest gear

Pacing Notes

On an undulating climb like this, chase even effort, not even speed. Your speed will swing wildly between the 27.55% ramp and the flatter recovery zones, and trying to hold a fixed pace will blow you up on the steep pitches. Anchor your effort to your sustainable power output and let the terrain dictate speed.

Practically, hold a touch below threshold on the steady sections and accept short surges above it on the steepest ramps, since you cannot avoid them. Ease slightly on the flatter parts rather than hammering to "make up time." If you do not know your numbers, run the FTP estimator before you ride so your pacing has a real ceiling.

Gearing

The 27.55% maximum gradient governs your setup. That pitch is steep enough to stall a road-standard drivetrain, so come with a compact or sub-compact chainset paired with a wide-range cassette. A 34×32 is the practical minimum; a 34×34 gives you more margin to keep spinning through the wall without grinding to a stop. Check your chainset and cassette before the ride, and confirm your rear derailleur can handle the largest sprocket. Discovering you are over-geared at the base of a 27.55% ramp is a mistake you only make once.

Summary

• Length: 15.6 km
• Average gradient: 5.34%
• Maximum gradient: 27.55%
• Net elevation gain: 834 m
• Total ascent: 1,167 m
• Category: 1

Puerto de Malagosto rewards riders who respect its undulation. The modest average masks a 27.55% ramp and 333 m of repeated re-climbing, so gear low, pace by effort, and let the profile, not the clock, set your speed.