Collado del Couso

Overview

Collado del Couso is a category 1 climb that covers 14 km and asks for a sustained, honest effort from bottom to top. From a start elevation of 129 m it climbs to a summit at 931 m, a net elevation gain of 802 m. The average gradient sits at 5.74%, which sounds moderate on paper but hides a lumpier reality: the steepest ramp bites at 12.49%. Over 14 km, that combination of length and pitch is what earns the category 1 label — one rung below hors catégorie and firmly in the territory where pacing and gearing decide your day.

With a total ascent of 780 m recorded along the road, the climb rolls rather than rising in a single clean line. The difference between the 802 m net gain and the 780 m of measured ascent tells you the profile is broadly relentless, without meaningful downhill respite to break the rhythm.

How the Gradient Unfolds

The 5.74% average is a useful anchor, but it is the spread around it that matters. With ramps reaching 12.49% — more than double the average — the road clearly stacks its difficulty into steeper walls separated by gentler drags. Expect to spend long stretches near or just above the average, then be forced out of the saddle when the gradient more than doubles.

Because the net gain of 802 m is spread across 14 km, there is nowhere to truly recover. This is a climb of accumulation: no single pitch is inhuman, but the sheer duration at 5.74% wears you down, and the 12.49% pinches punish anyone who has already spent too much.

Pacing Notes

The smart approach is to ride Collado del Couso off your FTP rather than off feel. On a 14 km effort, going into the red early on a 12.49% ramp costs you far more than the seconds it saves. Hold a steady, sustainable power on the 5.74% sections and treat the steep pitches as brief, controlled surges rather than all-out efforts.

If you don't already know your threshold, run the numbers through the FTP estimator before you set a target. Knowing your ceiling turns 802 m of climbing from a guessing game into a paced, repeatable effort you can hold all the way to 931 m.

Gearing

For a 14 km climb averaging 5.74% with ramps to 12.49%, gear generously. A compact chainring paired with a wide-range cassette is the sensible baseline. A 34×32 will get most riders up the sustained sections comfortably, but the 12.49% pinches are where a 34×34 earns its place — that extra sprocket keeps your cadence up and your legs intact when the road kicks. If you tend to grind, err toward the 34×34; the ability to spin through the steepest walls matters more over 14 km than any weight penalty.

Summary

Collado del Couso is a category 1 test defined by its length as much as its steepness: 14 km at 5.74% average, punctuated by a 12.49% maximum, lifting you 802 m from base to summit. Pace it off your threshold, gear for the walls, and let consistency carry you to the top.

Length: 14 km
Average gradient: 5.74%
Max gradient: 12.49%
Start: 129 m
Summit: 931 m
Net gain: 802 m
Total ascent: 780 m
Category: 1