Colláu Jozalba

Overview

Colláu Jozalba is a Category 3 climb in Spain, running 13.1 km from a valley start at 74 m to a summit at 572 m. The net elevation gain is 498 m. On paper that is a gentle profile, and the numbers alone suggest an easy tempo effort from bottom to top.

The profile is not that simple. Against 498 m of net gain, the climb racks up 1088 m of total ascent — roughly 590 m of extra vertical hidden in dips and re-climbs. That undulation means you are not climbing steadily; you are repeatedly descending and clawing the height back. Expect the effort to feel harder than the average gradient implies, because every recovery downhill costs you a fresh acceleration afterward.

How the Gradient Unfolds

The 3.8% average is a poor guide here. That figure is diluted by descending and flat sections, so the pitches you actually pedal are steeper than the headline number. The climbing is delivered in bursts rather than one long, even wall.

• Flatter and downhill recovery sections that pull the average down and break up any rhythm
• Repeated short climbs, each demanding a renewed surge after the preceding dip
• A steepest ramp well into double digits — save something for it

Pacing Notes

On a steady climb you can hold even effort and even speed at once. Colláu Jozalba does not allow that. Because the road rolls, chasing even speed forces you to spike far above your sustainable power output on every re-climb, then coast on the descents — a fast way to blow up.

Pace by effort instead. Let your speed rise on the descents and flats without adding watts, and hold a controlled ceiling on the ramps rather than surging to keep the numbers up. Know your threshold before you start; the FTP estimator gives you a target so you can cap the steep pitches and stay inside yourself across all 13.1 km.

Gearing

The steepest ramps here run into double-digit gradients, so gear for the pitches, not the average. A compact (50/34) or sub-compact chainset paired with a wide-range cassette will keep your cadence up when the road kicks. Aim for a bailout of at least 34×32, and 34×34 if your legs or load warrant it. Check your setup before the ride — confirm the cassette and rear-derailleur capacity now rather than grinding an over-geared bottom sprocket on the steepest section.

Summary

• Length: 13.1 km
• Average gradient: 3.8%
• Net elevation gain: 498 m
• Total ascent: 1088 m
• Category: 3

Colláu Jozalba reads as a soft Category 3, but the gap between 498 m of net gain and 1088 m of total ascent tells the real story. Pace by effort, gear for the ramps, and treat it as a rolling climb rather than a steady drag.