Collado de la Centenera

Overview

Collado de la Centenera is a Category 1 climb in Spain that runs 12.4 km from base to summit. It starts at 542 m and tops out at 1351 m, delivering a net elevation gain of 809 m at an average gradient of 6.51%. That combination of length and category places it firmly among the harder ascents a rider will tackle in a day, long enough to matter for pacing and steep enough to punish anyone who starts too hard.

The number that shapes the effort, though, is the gap between net gain and total ascent. You climb 809 m on paper, but the road actually adds 1033 m of ascent along the way. That 224 m difference is undulation: the road descends and then reclaims that height more than once. Every metre you give back has to be earned again, which is why the climb feels harder than a clean 6.51% grind and why rhythm is difficult to hold.

How the Gradient Unfolds

The 6.51% average is a blended figure and it hides a lot. With 224 m of extra ascent baked in, the profile is not a steady wall but a sequence of pitches broken by dips. Where the road eases or drops, the gradient briefly reads flat or negative; where it climbs, ramps sit well above average to compensate.

• Flatter and recovery sections where the road dips and gives back elevation
• Repeated short climbs that follow each descent, each one steeper than the average
• A steepest ramp that spikes well into double digits, sharp enough to force you out of the saddle

Pacing Notes

On a rolling climb like this, chasing an even speed is a trap. Holding constant speed means burning matches on every ramp and coasting on the descents, which spikes your effort exactly where it costs the most. Aim for even effort instead: hold a steady, repeatable output and let your speed fluctuate with the terrain.

Anchor that effort to your sustainable power output so the ramps do not push you into the red. If you do not have a current number, run the FTP estimator before you go, then sit just under threshold on the climbs and soft-pedal the dips to recover for the next pitch.

Gearing

The steepest ramps here are what dictate your setup, not the average. On pitches well into double figures you want the gears to keep your cadence up rather than grinding at low rpm. Run a compact or sub-compact chainset paired with a wide-range cassette, something like a 34x32 or 34x34, so you have a bailout gear for the sharpest sections.

Check your setup before the ride. Confirm your smallest chainring and largest sprocket actually give you the ratio you expect, and that the rear derailleur handles the full cassette range cleanly.

Summary

• Length: 12.4 km
• Average gradient: 6.51%
• Net elevation gain: 809 m
• Total ascent: 1033 m
• Category: 1

Collado de la Centenera rewards riders who respect its undulation. Pace to effort, gear for the steep ramps, and treat the descents as recovery rather than rest, and the 809 m of net gain will come without blowing up on the way.