Puertu de la Cubieḷḷa

Overview

Puertu de la Cubieḷḷa is a Category 1 climb in Spain, running 11.6 km from a valley floor at 848 m to a summit at 1,681 m. That gives a net elevation gain of 833 m at an average gradient of 7.19% — a serious, sustained effort that puts it firmly in the harder end of the category. On paper it reads as a long, steady grind, but the average understates what the road actually does underneath your wheels.

The number that matters most here is the gap between net gain and total ascent. You climb 833 m net, but the road forces 1,485 m of total ascent to get there — roughly 652 m of that is climbing you do twice, gained and given back across dips and false flats. This is a heavily undulating profile, not a clean ramp. Every metre you descend is a metre you have to re-climb, so plan for an effort noticeably larger than the net figure suggests.

How the Gradient Unfolds

A 7.19% average on an undulating climb is misleading in both directions: the recovery sections drag the number down, which means the climbing pitches are steeper than 7.19% to compensate. The steepest ramp hits 25.33% — a wall you cannot muscle over if you have already emptied yourself on the approach.

• Flatter and downhill recovery sections that break the rhythm and account for much of the 652 m of re-climbing
• Repeated short climbs stacked between the dips, each demanding a fresh surge
• A maximum pitch of 25.33% that dictates your gearing and your energy management for the whole climb

Pacing Notes

On a smooth climb you can hold even effort and let speed drift. Here, chasing an even speed is a trap — the descents would tempt you to push, and the 25.33% ramp would blow you apart. Pace to even effort instead. Settle on a target sustainable power output you can hold for the full 11.6 km, then hold it through the climbing pitches and back off, not up, on the descents. Bank the recovery.

If you do not know your ceiling, run the numbers through the FTP estimator before you commit to a target. On a climb with 1,485 m of total ascent, starting 20 watts too hot is a mistake you cannot walk back.

Gearing

The 25.33% maximum pitch governs your setup. That is steep enough to stall a standard chainset, so ride a compact (34-tooth) or sub-compact and pair it with a wide-range cassette — a 34×32 or 34×34 low gear gives you something to spin against when the road kicks vertical. Check your chainset and cassette before the ride, not at the base. You do not want to discover you are over-geared on a wall that steep.

Summary

• Length: 11.6 km
• Average gradient: 7.19%
• Maximum gradient: 25.33%
• Net elevation gain: 833 m
• Total ascent: 1,485 m
• Category: 1

Puertu de la Cubieḷḷa is defined by its undulation. The 833 m net gain undersells it; the 1,485 m of total ascent and the 25.33% wall are what you actually have to survive. Gear low, pace to effort, and respect the re-climbing.